CVE-2026-82522

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

Published Sep 2, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:09 PM
Reserved
Aug 29, 2026, 5:20 PM
Status
Deferred
Published
Sep 2, 2026, 6:21 PM
Modified
Sep 23, 2026, 5:17 PM