{"id":"CVE-2026-65979","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-65979","generatedAt":"2026-10-28T04:33:50.690Z","title":"When decoding, it advances the codestream pointer by the attacker-supplied header size and passes the resulting offset and remaining length to the OpenJPH memory-input path, so a crafted value pushes the pointer past the end of the buffer and causes an…","description":"OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.12, the HTJ2K decoder parses a header-length field (PLEN) from a chunk's compressed data but never checks that this value fits within the available buffer before using it. When decoding, it advances the codestream pointer by the attacker-supplied header size and passes the resulting offset and remaining length to the OpenJPH memory-input path, so a crafted value pushes the pointer past the end of the buffer and causes an out-of-bounds read. Because this field comes straight from attacker-controlled EXR chunk data, the flaw is reachable during normal decoding of an untrusted file. This issue is fixed in version 3.4.13.","published":"2026-08-25T19:16:52.000Z","lastModified":"2026-09-09T21:07:31.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":6.7,"severity":"MEDIUM","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-20","CWE-125"],"affected":[],"epss":{"score":0.0018,"percentile":0.0756,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/c7af2d233b7b2a4452c11f26cf47584cc2b35721","source":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.13","source":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3j9c-j7c9-x293","source":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3j9c-j7c9-x293","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-65979","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}