Description
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.
Published: 2026-09-02
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 01 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Libjxl Project
Libjxl Project libjxl
CPEs cpe:2.3:a:libjxl_project:libjxl:*:*:*:*:*:*:*:*
Vendors & Products Libjxl Project
Libjxl Project libjxl

Thu, 03 Sep 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Libjxl
Libjxl libjxl
Vendors & Products Libjxl
Libjxl libjxl

Wed, 02 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description 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.
Title libjxl < 0.12.0 Container Box Parser Integer Underflow via 32-bit Size Truncation
Weaknesses CWE-681
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': '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'}


Subscriptions

Libjxl Libjxl
Libjxl Project Libjxl
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T15:21:43.257Z

Reserved: 2026-08-29T17:20:57.081Z

Link: CVE-2026-82522

cve-icon Vulnrichment

Updated: 2026-09-02T18:01:53.919Z

cve-icon NVD

Status : Deferred

Published: 2026-09-02T18:21:27.587

Modified: 2026-09-23T17:17:43.213

Link: CVE-2026-82522

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T10:30:12Z

Weaknesses