CVE-2026-82522 Details
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.
An integer underflow vulnerability has been identified in libjxl versions prior to 0.12.0, specifically within the container box parser. This vulnerability allows remote attackers to inject arbitrary metadata by exploiting the truncation of 64-bit box sizes to size_t on 32-bit platforms. Attackers can craft JPEG XL files that manipulate the decoder into interpreting controlled codestream bytes as phantom box headers. This exploitation could lead to the injection of various metadata types, including Exif, XMP, IPTC, and JUMBF, and potentially cause out-of-bounds read operations.
Users are advised to update to libjxl version 0.12.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 2, 2026CISA-ADP
Assessed Sep 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68 | [email protected] | Source CodeVendor |
| https://github.com/libjxl/libjxl/pull/4885 | [email protected] | Issue TrackingVendor |
| https://github.com/libjxl/libjxl/releases/tag/v0.12.0 | [email protected] | Release NotesVendor |
| https://www.vulncheck.com/advisories/libjxl-container-box-parser-integer-underflow-via-32-bit-size-truncation | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-681 | Incorrect Conversion between Numeric Types | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libjxl | < 0.12.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 2, 2026 | CVE Modified | CISA-ADP |
| Sep 2, 2026 | New CVE Received | [email protected] |