BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-34486High confidence

Apache Tomcat Missing Encryption of Sensitive Data Vulnerability

Apache · Tomcat

7.5HighCVSS 3.1
Recommended action
Patch now

CISA confirms exploitation in the wild and lists 2026-08-07 as the remediation due date.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 4 Aug 2026

Evidence used

  • CISA confirms exploitation in the wild.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 6.56% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Apache Tomcat and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

11 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcetomcat10Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian trixietrixie · sourcetomcat11Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian trixietrixie · sourcetomcat9Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcetomcat10Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcetomcat9Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcetomcat10Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcetomcat11Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcetomcat9Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcetomcat10Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcetomcat11Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcetomcat9Not affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Open-source package ranges12 source-attributed ranges

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
Mavenorg.apache.tomcat:tomcatECOSYSTEM: introduced 11.0.20; fixed 11.0.2111.0.21OSV record ↗aggregator derived · 10 Sep 2026
Mavenorg.apache.tomcat:tomcatECOSYSTEM: introduced 10.1.53; fixed 10.1.5410.1.54OSV record ↗aggregator derived · 10 Sep 2026
Mavenorg.apache.tomcat:tomcatECOSYSTEM: introduced 9.0.116; fixed 9.0.1179.0.117OSV record ↗aggregator derived · 10 Sep 2026
Mavenorg.apache.tomcat:tomcat-tribesECOSYSTEM: introduced 11.0.20; fixed 11.0.2111.0.21OSV record ↗aggregator derived · 10 Sep 2026
Mavenorg.apache.tomcat:tomcat-tribesECOSYSTEM: introduced 10.1.53; fixed 10.1.5410.1.54OSV record ↗aggregator derived · 10 Sep 2026
Mavenorg.apache.tomcat:tomcat-tribesECOSYSTEM: introduced 9.0.116; fixed 9.0.1179.0.117OSV record ↗aggregator derived · 10 Sep 2026
mavenorg.apache.tomcat:tomcat= 11.0.2011.0.21GitHub advisory ↗github reviewed aggregator · 8 Jun 2026
mavenorg.apache.tomcat:tomcat= 10.1.5310.1.54GitHub advisory ↗github reviewed aggregator · 8 Jun 2026
mavenorg.apache.tomcat:tomcat= 9.0.1169.0.117GitHub advisory ↗github reviewed aggregator · 8 Jun 2026
mavenorg.apache.tomcat:tomcat-tribes= 11.0.2011.0.21GitHub advisory ↗github reviewed aggregator · 8 Jun 2026
mavenorg.apache.tomcat:tomcat-tribes= 10.1.5310.1.54GitHub advisory ↗github reviewed aggregator · 8 Jun 2026
mavenorg.apache.tomcat:tomcat-tribes= 9.0.1169.0.117GitHub advisory ↗github reviewed aggregator · 8 Jun 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-21056

CISA KEV mirrored by ENISA

Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 4 Aug 2026. Evidence sources: cisa_kev.
ENISA score
7.5 · CVSS 3.1
Advisory evidence
30 linked advisory records
Explicit mitigation evidence

Only statements that explicitly mention a fix, patch, update, workaround or mitigation are shown here.

  • csaf_opensuse · openSUSE-SU-2026:20611-1Security update for tomcat
  • csaf_redhat · RHSA-2026:36879security update for tomcat
  • csaf_suse · SUSE-SU-2026:21366-1Security update for tomcat11
  • csaf_suse · SUSE-SU-2026:1604-1Security update for tomcat
  • csaf_redhat · RHSA-2026:25341security update for tomcat9
  • csaf_redhat · RHSA-2026:36788security update for tomcat
  • csaf_redhat · RHSA-2026:36787Red Hat Security Advisory: tomcat security update
  • csaf_suse · SUSE-SU-2026:1603-1Security update for tomcat10
  • csaf_suse · SUSE-SU-2026:21379-1Security update for tomcat10
  • csaf_opensuse · openSUSE-SU-2026:20612-1Security update for tomcat10
  • csaf_redhat · RHSA-2026:36877security update for tomcat
  • csaf_suse · SUSE-SU-2026:21378-1Security update for tomcat
  • csaf_suse · SUSE-SU-2026:1572-1Security update for tomcat
  • csaf_redhat · RHSA-2026:37136Red Hat Security Advisory: tomcat security update
  • csaf_redhat · RHSA-2026:38505Red Hat Security Advisory: tomcat security, bug fix, and enhancement update
  • csaf_redhat · RHSA-2026:36878Red Hat Security Advisory: tomcat security update
  • csaf_redhat · RHSA-2026:37137security update for tomcat
  • csaf_opensuse · openSUSE-SU-2026:20595-1Security update for tomcat11
  • csaf_suse · SUSE-SU-2026:1558-1Security update for tomcat11
  • csaf_redhat · RHSA-2026:36790Red Hat Security Advisory: tomcat9 security, bug fix, and enhancement update
  • csaf_redhat · RHSA-2026:26323Red Hat Security Advisory: tomcat security update
  • csaf_redhat · RHSA-2026:36789Red Hat Security Advisory: tomcat9 security update
  • csaf_redhat · RHSA-2026:36876Red Hat Security Advisory: tomcat security update
Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2026-08-07 as the remediation due date.

Patch available
01

What, why and how

Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. This vulnerability can be chained with CVE‑2025‑24813.

What

Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. This vulnerability can be chained with CVE‑2025‑24813.

Why

The product does not encrypt sensitive or critical information before storage or transmission.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. This vulnerability can be chained with CVE‑2025‑24813.

Why

The product does not encrypt sensitive or critical information before storage or transmission.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2026-08-04.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Missing Encryption of Sensitive Data → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-311 ↗

CWE-311: Missing Encryption of Sensitive Data. The product does not encrypt sensitive or critical information before storage or transmission.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-311CISA KEV
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-21056Known-exploited evidence recorded

Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.

Official EUVD record ↗
BSI · German · WID-SEC-2026-1955Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management ausnutzen, um beliebigen Code auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand auszulösen.

Official advisory ↗
BSI · German · WID-SEC-2026-1038Apache Tomcat und Tomcat Native: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen, Open-Redirect-Angriffe durchzuführen und andere, nicht näher spezifizierte Angriffe auszuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260415Security Bulletin 15 April 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 15 April 2026, published on 15 April 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0773Multiples vulnérabilités dans les produits Atlassian

rowse/JSWSERVER-26841 Référence CVE CVE-2021-3803 https://www.cve.org/CVERecord?id=CVE-2021-3803 Référence CVE CVE-2026-26996 https://www.cve.org/CVERecord?id=CVE-2026-26996 Référence CVE CVE-2026-27903 https://www.cve.org/CVERecord?id=CVE-2026-27903 Référence CVE CVE-2026-27904 https://www.cve.org/CVERecord?id=CVE-2026-27904 Référence CVE CVE-2026-29129 https://www.cve.org/CVERecord?id=CVE-2026-29129 Référence CVE CVE-2026-33870 https://www.cve.org/CVERecord?id=CVE-2026-33870 Référence CVE CVE-2026-33871 https://www.cve.org/CVERecord?id=CVE-2026-33871 Référence CVE CVE-2026-34077 https://www.cve.org/CVERecord?id=CVE-2026-34077 Référence CVE CVE-2026-34486 https://www.cve.org/CVERecord?id=CVE-2026-34486 Référence CVE CVE-2026-34487 https://www.cve.org/CVERecord?id=CVE-2026-34487 Référence CVE CVE-2026-40175 https://www.cve.org/CVERecord?id=CVE-2026-40175 Référence CVE CVE-2026-41284 https://www.cve.org/CVERecord?id=CVE-2026-41284 Référence CVE CVE-2026-41293 https://www.cve.org/CVERecord?id=CVE-2026-41293 Référence CVE CVE-2026-42033 https://www.cve.org/CVERecord?id=CVE-2026-42033 Référence CVE CVE-2026-42035 https://www.cve.org/CVERecord?id=CVE-2026-42035 Référence CVE CVE-2026-42038 https://www.cve.org/CVERecord?id=CVE-2026-42038 Référence CVE CVE-2026-42043 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0500Multiples vulnérabilités dans VMware Tanzu

d?id=CVE-2026-33671 Référence CVE CVE-2026-33672 https://www.cve.org/CVERecord?id=CVE-2026-33672 Référence CVE CVE-2026-33750 https://www.cve.org/CVERecord?id=CVE-2026-33750 Référence CVE CVE-2026-33816 https://www.cve.org/CVERecord?id=CVE-2026-33816 Référence CVE CVE-2026-33870 https://www.cve.org/CVERecord?id=CVE-2026-33870 Référence CVE CVE-2026-33871 https://www.cve.org/CVERecord?id=CVE-2026-33871 Référence CVE CVE-2026-34043 https://www.cve.org/CVERecord?id=CVE-2026-34043 Référence CVE CVE-2026-34480 https://www.cve.org/CVERecord?id=CVE-2026-34480 Référence CVE CVE-2026-34483 https://www.cve.org/CVERecord?id=CVE-2026-34483 Référence CVE CVE-2026-34486 https://www.cve.org/CVERecord?id=CVE-2026-34486 Référence CVE CVE-2026-34487 https://www.cve.org/CVERecord?id=CVE-2026-34487 Référence CVE CVE-2026-3449 https://www.cve.org/CVERecord?id=CVE-2026-3449 Référence CVE CVE-2026-34500 https://www.cve.org/CVERecord?id=CVE-2026-34500 Référence CVE CVE-2026-40175 https://www.cve.org/CVERecord?id=CVE-2026-40175 Référence CVE CVE-2026-41239 https://www.cve.org/CVERecord?id=CVE-2026-41239 Référence CVE CVE-2026-41240 https://www.cve.org/CVERecord?id=CVE-2026-41240 Référence CVE CVE-2026-4800 https://www.cve.org/CVERecord?id=CVE-2026-4800 Gestion détaillée du document le 27 avril 2026 Version initiale Al

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0418Multiples vulnérabilités dans Apache Tomcat

De multiples vulnérabilités ont été découvertes dans Apache Tomcat. Elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données, une atteinte à l'intégrité des données et un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-011129Apache Software FoundationのApache Tomcatにおける重要なデータの暗号化の欠如に関する脆弱性

Apache Tomcatにおける機密データの暗号化が欠如する脆弱性は、特定のInterceptorsが暗号化を回避できる問題です。この脆弱性はApache Tomcatのバージョン11.0.20、10.1.53、9.0.116に影響します。ユーザーは修正版のバージョン11.0.21、10.1.54、9.0.117にアップグレードすることを推奨します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6907Apache 제품 보안 업데이트 권고

Apache Tomcat에서 발생하는 Missing Encryption of Sensitive Data 취약점(CVE-2026-34486) [1][2]

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6899美 CISA 발표 주요 Exploit 정보공유(Update. 2026-08-04)

Apache Tomcat Missing Encryption of Sensitive Data Vulnerability

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Apache Tomcat: 11.0.20, 9.0.116, 10.1.53
Fixed
RHSA-2026:39188: Red Hat JBoss Web Server 7.0 on RHEL 10, Red Hat JBoss Web Server 7.0 on RHEL 8, Red Hat JBoss Web Server 7.0 on RHEL 9
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

04

Evidence and provenance

Published 9 Apr 2026 · Last source change 21 Sept 2026, 19:43 UTC · CWE-311 · Missing Encryption of Sensitive Data

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-21056
Product sourceCISA KEV
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: added remediation: lists.apache.org/9510k5p5zdvt9pkkgtyp85mvwxo2qrly; removed remediation: vicarius.io/cve-2026-34486-mitigation-script-rce-on-apache-tomcat.
    Before
    mitigation: vicarius.io/cve-2026-34486-mitigation-script-rce-on-apache-tomcat · remediation: vicarius.io/cve-2026-34486-mitigation-script-rce-on-apache-tomcat · vendor advisory: lists.apache.org/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
    After
    mitigation: vicarius.io/cve-2026-34486-mitigation-script-rce-on-apache-tomcat · remediation: lists.apache.org/9510k5p5zdvt9pkkgtyp85mvwxo2qrly · vendor advisory: lists.apache.org/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
    security@apache.org ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    11.0.20; 10.1.53; 9.0.116 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    Apache Tomcat: 11.0.20, 10.1.53, 9.0.116 · Fixed: RHSA-2026:39188: Red Hat JBoss Web Server 7.0 on RHEL 10, Red Hat JBoss Web Server 7.0 on RHEL 8, Red Hat JBoss Web Server 7.0 on RHEL 9
    CNA ↗
  3. Remediation statusRemediation status changed from Mitigation available to Patch available.
    Before
    Mitigation available
    After
    Patch available
    security@apache.org ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-21056↗CISA KEV record↗CVE authority or vendor reference↗Mitigation reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-34486 · cve.blacktree.nl