CVE-2026-82522libjxl < 0.12.0 Container Box Parser Integer Underflow via 32-bit Size Truncation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-681
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
libjxl libjxl libjxl:libjxl (from the name) | before 0.12.0 | CNA record |
References
- https://github.com/libjxl/libjxl/releases/tag/v0.12.0release-notes
- https://github.com/libjxl/libjxl/pull/4885issue-tracking
- https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68patch
- https://www.vulncheck.com/advisories/libjxl-container-box-parser-integer-underflow-via-32-bit-size-truncationthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.