{"cve":"CVE-2026-34589","nvd":{"published":"2026-04-06T16:16:36.040","modified":"2026-10-26T22:10:00.163","status":"Modified","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.4},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","score":5.0},"cwes":["CWE-190","CWE-787"],"references":["https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7","https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9","https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9","https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x","https://access.redhat.com/security/cve/CVE-2026-34589"],"products":["openexr:openexr"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-34589","score":0.00419,"percentile":0.35965,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-p8xc-w3q4-h64x","url":"https://osv.dev/vulnerability/GHSA-p8xc-w3q4-h64x","summary":"OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write","modified":"2026-07-13T16:43:24.943387949Z","packages":[{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.2.0 <3.2.7"],"fixed":["3.2.7"]},{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.3.0 <3.3.9"],"fixed":["3.3.9"]},{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.4.0 <3.4.9"],"fixed":["3.4.9"]}]},{"id":"PYSEC-2026-2848","url":"https://osv.dev/vulnerability/PYSEC-2026-2848","summary":"OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write","modified":"2026-07-13T16:32:33.950478683Z","packages":[{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.2.0 <3.2.7",">=3.3.0 <3.3.9",">=3.4.0 <3.4.9"],"fixed":["3.2.7","3.3.9","3.4.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}