{"affected":[{"defaultStatus":"affected","ecosystem":"github","packageName":"libjxl/libjxl","product":"libjxl","source":"CNA: VulnCheck","vendor":"libjxl","versions":[{"lessThan":"0.12.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-82522","cwes":["CWE-681"],"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.","epss":{"date":"2026-11-08","percentile":0.35271,"score":0.00407},"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","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","version":"4.0"},{"score":5.4,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1794146951377,"publishedAt":1788370667649,"references":[{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/libjxl/libjxl/releases/tag/v0.12.0"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/libjxl/libjxl/pull/4885"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/libjxl-container-box-parser-integer-underflow-via-32-bit-size-truncation"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/libjxl/libjxl/pull/4885"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68"}],"revision":"ac1b0e5d7c84fdd86ba2c0144cc04438f6584f32ac394f0dc60b6dcddbc69d2a","sources":[{"modifiedAt":1794146951377,"name":"CNA: VulnCheck","retrievedAt":1794151388908,"url":"https://www.cve.org/CVERecord?id=CVE-2026-82522"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794151398189,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-82522"}],"ssvc":{"assessedAt":1788372100950,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"libjxl < 0.12.0 Container Box Parser Integer Underflow via 32-bit Size Truncation","updatedAt":1794151398189}