{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0","last_affected":"1.12"}],"component":"uefi-firmware","cve_ids":["CVE-2026-54334"],"ecosystem":"PyPI","epss":0.00801,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-hm2w-vr2p-hq7w","id":"tcs_01M5KH534X22AQVZ92S1T67D32","modified_at":"2026-07-13T16:33:27.543929183Z","published_at":"2026-07-13T15:02:48.573733Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3394","https://github.com/theopolis/uefi-firmware-parser/security/advisories/GHSA-hm2w-vr2p-hq7w","https://github.com/theopolis/uefi-firmware-parser/pull/145","https://github.com/theopolis/uefi-firmware-parser/commit/bf3dfaa8a05675bae6ea0cbfa082ddcebfcde23e","https://github.com/theopolis/uefi-firmware-parser","https://pypi.org/project/uefi-firmware","https://github.com/advisories/GHSA-hm2w-vr2p-hq7w","https://nvd.nist.gov/vuln/detail/CVE-2026-54334"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"PYSEC-2026-3394","url":"https://osv.dev/vulnerability/PYSEC-2026-3394"}],"summary":"UEFI Firmware Parser has a heap out-of-bounds write in tiano decompressor ReadCLen"}