{"cve":"CVE-2026-34544","nvd":{"published":"2026-04-01T21:17:01.480","modified":"2026-10-26T00:10:00.150","status":"Analyzed","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exr_decoding_run(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.","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:H/I:H/A:H","score":7.3},"cwes":["CWE-190","CWE-787"],"references":["https://github.com/AcademySoftwareFoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee","https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8","https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-h762-rhv3-h25v"],"products":["openexr:openexr"],"source":"nvd","synced_at":"2026-10-26T00:31:35.753532240+00:00"},"epss":{"cve":"CVE-2026-34544","score":0.00244,"percentile":0.15436,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-h762-rhv3-h25v","url":"https://osv.dev/vulnerability/GHSA-h762-rhv3-h25v","summary":"OpenEXR: integer overflow to OOB write in uncompress_b44_impl()","modified":"2026-09-10T03:50:12.408050069Z","packages":[{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.4.0 <3.4.8"],"fixed":["3.4.8"]},{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.3.0 <=3.3.8"],"fixed":[]},{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.2.0 <=3.2.6"],"fixed":[]}]},{"id":"PYSEC-2026-2847","url":"https://osv.dev/vulnerability/PYSEC-2026-2847","summary":"OpenEXR: integer overflow to OOB write in uncompress_b44_impl()","modified":"2026-07-13T16:32:33.035538353Z","packages":[{"ecosystem":"PyPI","name":"openexr","purl":"pkg:pypi/openexr","ranges":[">=3.2.0 <3.4.8"],"fixed":["3.4.8"]}]}],"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."]}