{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-120252","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-31T22:06:00.916Z","datePublished":"2026-11-01T00:57:15.614Z","dateUpdated":"2026-11-01T00:57:15.614Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-01T00:57:15.614Z"},"datePublic":"2026-10-10T00:00:00.000Z","title":"imagecodecs 2023.1.23 through 2026.10.10 Stack Buffer Overflow via jpegsof3_decode()","descriptions":[{"lang":"en","value":"imagecodecs 2023.1.23 through 2026.10.10 contains a stack-based buffer overflow vulnerability in the lossless JPEG Define Huffman Table parser in decode_jpegsof3(). Attackers can supply a crafted lossless JPEG whose DHT symbol counts wrap an 8-bit sum, overflowing the 32-entry HufVal and HufSz stack arrays and crashing the calling process."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Stack-based Buffer Overflow","cweId":"CWE-121","type":"CWE"}]}],"affected":[{"vendor":"cgohlke","product":"imagecodecs","defaultStatus":"unaffected","versions":[{"version":"2023.1.23","lessThanOrEqual":"2026.10.10","status":"affected","versionType":"custom"}],"packageURL":"pkg:pypi/imagecodecs","repo":"https://github.com/cgohlke/imagecodecs"}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/cgohlke/imagecodecs/issues/157","tags":["issue-tracking"],"name":"GitHub Issue #157"},{"url":"https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/jpegsof3/jpegsof3.cpp#L394","tags":["technical-description"]},{"url":"https://github.com/cgohlke/imagecodecs","tags":["product"]},{"name":"VulnCheck Advisory: imagecodecs 2023.1.23 through 2026.10.10 Stack Buffer Overflow via jpegsof3_decode()","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/imagecodecs-2023.1.23-through-2026.10.10-stack-buffer-overflow-via-jpegsof3-decode"}],"credits":[{"lang":"en","value":"Dilanka Kaushal Hewage (r3vpwnx)","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}