{"id":"CVE-2026-82522","title":"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","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 su…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-681"],"published":"2026-09-02","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:43.213","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82522","references":[{"url":"https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68","label":"disclosure@vulncheck.com"},{"url":"https://github.com/libjxl/libjxl/pull/4885","label":"disclosure@vulncheck.com"},{"url":"https://github.com/libjxl/libjxl/releases/tag/v0.12.0","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/libjxl-container-box-parser-integer-underflow-via-32-bit-size-truncation","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00233,"epssPercentile":0.14504,"ingestedAt":"2026-09-23T17:28:14.821Z","slug":"CVE-2026-82522","body":"## Overview\n\nlibjxl 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}