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Full vulnerability report · 2025
CVE-2025-13467High confidence

Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation

Keycloak · Keycloak

Official source article: Red Hat RHSA-2025:22088 ↗. Check the applicable product and release in the original source.

5.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.44% 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.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Keycloak Keycloak 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: As exposure requiresRemediation target: Within 365 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.

Open-source package ranges2 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.keycloak:keycloak-ldap-federation>= 26.3.0, < 26.4.626.4.6GitHub advisory ↗upstream repository advisory · 17 Feb 2026
mavenorg.keycloak:keycloak-ldap-federation< 26.2.1126.2.11GitHub advisory ↗upstream repository advisory · 17 Feb 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2025-13467 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityorg.keycloak.storage.ldap: Keycloak: Deserialization of Untrusted Data in LDAP User Federation
20 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • rhbk/keycloak-operator-bundle@sha256:dbebd9c370278ca9745863823ea05be8026400f70ada7650d65ef381841bfc5b_amd64 as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9-operator@sha256:56c72c8a7c8fc6dc429272f50d1ca7d2c1f3c20819f86c314ecd16df7067f348_s390x as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9-operator@sha256:57d64e64c4b64a802faf366d4e156d01b04c2fbb3d866b123ac4c2f82968a46f_arm64 as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9-operator@sha256:b9525ea17de357c938972cc8c6cf78ba1fc1902901e1759908e9fcb2c0e72aed_amd64 as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9-operator@sha256:d7602888e037d4d5bba73f896e4537721130464ef82406c31a445701f015f93b_ppc64le as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9@sha256:31618f217a7d9a08945106f507dd0ca02b3850d183c4915311203423204a4c03_s390x as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9@sha256:527c210541d8669a7b08029be54f411512f14fe887d92569801e8801f8c001f5_amd64 as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9@sha256:8c52f172dd64c5d4a4078a3d9af16612151607332eea832c6ded4600d71c68ca_ppc64le as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-rhel9@sha256:c9da93981df5435ded6a22b5a36876c4a10f66ebc4d4f91fdd9e2084e6b60a2f_arm64 as a component of Red Hat build of Keycloak 26.2
  • rhbk/keycloak-operator-bundle@sha256:21319807f584783e091bbd03066624d759e699e72e38f42f8e69f5d59d1ca31c_amd64 as a component of Red Hat build of Keycloak 26.4
  • rhbk/keycloak-rhel9-operator@sha256:4a70c9fc5c12822bdc9dad06b0455d9b4ae847f080123856b8bf4f683933e60b_s390x as a component of Red Hat build of Keycloak 26.4
  • rhbk/keycloak-rhel9-operator@sha256:68f820e741c80a4cc1b1498531a40bfb4d2776bb52247d206e9ba698ef951930_arm64 as a component of Red Hat build of Keycloak 26.4
Summary
A flaw was found in the Keycloak LDAP User Federation provider. This vulnerability allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration.
Remediation
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
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-2025-199598

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

A flaw was found in the Keycloak LDAP User Federation provider. This vulnerability allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration.

What

A flaw was found in the Keycloak LDAP User Federation provider. This vulnerability allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration.

Why

Attacker-influenced serialised data is reconstructed as trusted objects, which can invoke dangerous application behaviour.

How

An attacker operating through a network path may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A flaw was found in the Keycloak LDAP User Federation provider. This vulnerability allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration.

Why

Attacker-influenced serialised data is reconstructed as trusted objects, which can invoke dangerous application behaviour.

How

An attacker operating through a network path may attempt exploitation with elevated privileges. 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.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

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 → Deserialization of Untrusted Data → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
High: elevated access is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-502 ↗

CWE-502: Deserialization of Untrusted Data. The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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:H/UI:N/S:C/C:L/I:L/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.PRHighPrivileges required: The attacker needs elevated or administrative privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.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.
NetworkCWE-502
A

Official authority intelligence

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

BSI · German · WID-SEC-2025-2650Keycloak: Schwachstelle ermöglicht Offenlegung von Informationen

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um Informationen offenzulegen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20251126Security Bulletin 26 Nov 2025

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 26 Nov 2025, published on 26 November 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-026852Hitachi Ops Center Common Servicesにおける複数の脆弱性

Hitachi Ops Center Common Servicesに下記の脆弱性が存在します。 CVE-2025-10939, CVE-2025-11537, CVE-2025-11538, CVE-2025-12110, CVE-2025-13467, CVE-2025-13881, CVE-2025-14082, CVE-2025-14083, CVE-2025-14777, CVE-2025-66560, CVE-2026-0707, CVE-2026-0871, CVE-2026-0976, CVE-2026-1035, CVE-2026-1190, CVE-2026-2092, CVE-2026-2575, CVE-2026-2673, CVE-2026-3009, CVE-2026-3121, CVE-2026-3429, CVE-2026-3872, CVE-2026-3911, CVE-2026-4282, CVE-2026-4325, CVE-2026-4634, CVE-2026-22745, CVE-2026-22748, CVE-2026-25854, CVE-2026-40972, CVE-2026-40975

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
Keycloak: < 26.4.6
Fixed
Action
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 25 Nov 2025 · Last source change 23 Dec 2025, 21:00 UTC · CWE-502 · Deserialization of Untrusted Data

CVE recordCVE.org · 5.2
CVSS sourceCNA
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-2025-199598
Product sourceCNA
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled

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

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2025-199598↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference · Red Hat RHSA-2025:22088↗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-2025-13467 · cve.blacktree.nl