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Full vulnerability report · 2026
CVE-2026-82522High confidence

libjxl < 0.12.0 Container Box Parser Integer Underflow via 32-bit Size Truncation

libjxl · libjxl

5.3MediumCVSS 4.0
Recommended action
Patch only the product branches with a verified fix

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. Verified remediation exists for at least one product or source, but 58 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
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 0.41% 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 libjxl libjxl 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.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 58 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

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

5 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 4 affected package states shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

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 · sourcejpeg-xlAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcejpeg-xlAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcejpeg-xlAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcejpeg-xlAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivejpeg-xlUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 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-2026-82522 · CSAF 2.0 · revision 4 · interimSUSE Product Security TeamCVE-2026-82522
54 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • libmozjs-115-0 as component of SUSE Linux Enterprise Desktop 15 SP7
  • mozjs115 as component of SUSE Linux Enterprise Desktop 15 SP7
  • mozjs115-devel as component of SUSE Linux Enterprise Desktop 15 SP7
  • libmozjs-115-0 as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7
  • mozjs115 as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7
  • mozjs115-devel as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7
  • libjxl as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • libjxl-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • libjxl-tools as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • libjxl0_10 as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • libjxl0_10-32bit as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP6-LTSS
Summary
libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.
Remediation
No remediation text is recorded.
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-2026-70241

No EUVD known-exploited evidence

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

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
5.3 · CVSS 4.0
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. Verified remediation exists for at least one product or source, but 58 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

What

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

Why

When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

How

An attacker operating through a network path may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

Why

When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

How

An attacker operating through a network path may attempt exploitation when the stated preconditions are met. 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 → Incorrect Conversion between Numeric Types → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Passive interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-681 ↗

CWE-681: Incorrect Conversion between Numeric Types. When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: 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.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIPassiveUser interaction: A user must unknowingly interact with the vulnerable system.VCLowVulnerable-system confidentiality: A successful attack can cause a limited loss.VILowVulnerable-system integrity: A successful attack can cause a limited loss.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: 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-681
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-70241Official EUVD mapping

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

Official EUVD record ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260909Security Bulletin 9 Sep 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 9 Sep 2026, published on 9 September 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

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.
Fix availability varies by product
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
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 2 Sept 2026 · Last source change 1 Oct 2026, 15:21 UTC · CWE-681 · Incorrect Conversion between Numeric Types

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 2026-09-03
European sourceENISA EUVD · EUVD-2026-70241
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceCVE/CNA references
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 ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    libmozjs-115-0 as component of SUSE Linux Enterprise Desktop 15 SP7; mozjs115 as component of SUSE Linux Enterprise Desktop 15 SP7; mozjs115-devel as component of SUSE Linux Enterprise Desktop 15 SP7; libmozjs-115-0 as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7; mozjs115 as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7; mozjs115-devel as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7; libjxl as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl-tools as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl0_10 as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl0_10-32bit as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP6-LTSS; mozjs115 as component of SUSE Linux Enterprise Server 15 SP6-LTSS; mozjs115-devel as component of SUSE Linux Enterprise Server 15 SP6-LTSS; libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP6; mozjs115 as component of SUSE Linux Enterprise Server 15 SP6; mozjs115-devel as component of SUSE Linux Enterprise Server 15 SP6; libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP7; mozjs115 as component of SUSE Linux Enterprise Server 15 SP7; mozjs115-devel as component of SUSE Linux Enterprise Server 15 SP7; libjxl as component of SUSE Linux Enterprise Server 16.0; libjxl-devel as component of SUSE Linux Enterprise Server 16.0; libjxl0_11 as component of SUSE Linux Enterprise Server 16.0; libjxl0_11-x86-64-v3 as component of SUSE Linux Enterprise Server 16.0; libmozjs-128-0 as component of SUSE Linux Enterprise Server 16.0; mozjs128 as component of SUSE Linux Enterprise Server 16.0; mozjs128-devel as component of SUSE Linux Enterprise Server 16.0; libmozjs-115-0 as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6; mozjs115 as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6; mozjs115-devel as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6; and 12 more
    After
    libmozjs-115-0 as component of SUSE Linux Enterprise Desktop 15 SP7; mozjs115 as component of SUSE Linux Enterprise Desktop 15 SP7; mozjs115-devel as component of SUSE Linux Enterprise Desktop 15 SP7; libmozjs-115-0 as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7; mozjs115 as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7; mozjs115-devel as component of SUSE Linux Enterprise Module for Desktop Applications 15 SP7; libjxl as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl-tools as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl0_10 as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libjxl0_10-32bit as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP6-LTSS; mozjs115 as component of SUSE Linux Enterprise Server 15 SP6-LTSS; mozjs115-devel as component of SUSE Linux Enterprise Server 15 SP6-LTSS; libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP6; mozjs115 as component of SUSE Linux Enterprise Server 15 SP6; mozjs115-devel as component of SUSE Linux Enterprise Server 15 SP6; libmozjs-115-0 as component of SUSE Linux Enterprise Server 15 SP7; mozjs115 as component of SUSE Linux Enterprise Server 15 SP7; mozjs115-devel as component of SUSE Linux Enterprise Server 15 SP7; libjxl as component of SUSE Linux Enterprise Server 16.0; libjxl-devel as component of SUSE Linux Enterprise Server 16.0; libjxl0_11 as component of SUSE Linux Enterprise Server 16.0; libjxl0_11-x86-64-v3 as component of SUSE Linux Enterprise Server 16.0; libmozjs-128-0 as component of SUSE Linux Enterprise Server 16.0; mozjs128 as component of SUSE Linux Enterprise Server 16.0; mozjs128-devel as component of SUSE Linux Enterprise Server 16.0; libjxl as component of SUSE Linux Enterprise Server 16.1; libjxl-devel as component of SUSE Linux Enterprise Server 16.1; libjxl0_11 as component of SUSE Linux Enterprise Server 16.1; and 24 more
    SUSE Product Security Team ↗
  2. ENISA EUVD mappingEUVD-2026-70241 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-70241"}
    ENISA EUVD ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 0.12.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    libjxl: < 0.12.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  4. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-70241↗Vendor CSAF · SUSE Product Security Team↗CVE authority or vendor 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-2026-82522 · cve.blacktree.nl