{"id":"CVE-2026-107705","state":"PUBLISHED","title":"Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()","description":"Poppler 0.42.0 through 26.10.0 contains a stack-based buffer overflow in Decrypt::revision6Hash() that allows attackers controlling the password to overwrite stack memory when opening AESV3/R6 encrypted PDFs. Attackers can supply a password longer than 127 bytes through applications using the libpoppler, libpoppler-glib or C++ API to overflow the K1 and E buffers, crashing the process or corrupting memory.","publishedAt":"2026-10-08T19:51:12.884Z","updatedAt":"2026-10-14T16:05:29.301Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["freedesktop poppler"],"affected":[{"vendor":"freedesktop","product":"poppler","defaultStatus":"unaffected","versions":[{"version":"0.42.0","status":"affected","lessThanOrEqual":"26.10.0","versionType":"semver"}]}],"references":["https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1814","https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2398","https://gitlab.freedesktop.org/poppler/poppler/-/blob/poppler-26.10.0/poppler/Decrypt.cc#L1767","https://gitlab.freedesktop.org/poppler/poppler","https://www.vulncheck.com/advisories/poppler-0.42.0-through-26.10.0-stack-buffer-overflow-via-decrypt-revision6hash"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107705.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107705","state":"PUBLISHED","datePublished":"2026-10-08T19:51:12.884Z","dateUpdated":"2026-10-14T16:05:29.301Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-08T16:52:24.550Z"},"containers":{"cna":{"title":"Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()","descriptions":[{"lang":"en","value":"Poppler 0.42.0 through 26.10.0 contains a stack-based buffer overflow in Decrypt::revision6Hash() that allows attackers controlling the password to overwrite stack memory when opening AESV3/R6 encrypted PDFs. Attackers can supply a password longer than 127 bytes through applications using the libpoppler, libpoppler-glib or C++ API to overflow the K1 and E buffers, crashing the process or corrupting memory."}],"affected":[{"vendor":"freedesktop","product":"poppler","defaultStatus":"unaffected","versions":[{"version":"0.42.0","status":"affected","lessThanOrEqual":"26.10.0","versionType":"semver"}]}],"references":[{"url":"https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1814","tags":["issue-tracking"]},{"url":"https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2398","tags":["patch"]},{"url":"https://gitlab.freedesktop.org/poppler/poppler/-/blob/poppler-26.10.0/poppler/Decrypt.cc#L1767","tags":["technical-description"]},{"url":"https://gitlab.freedesktop.org/poppler/poppler","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/poppler-0.42.0-through-26.10.0-stack-buffer-overflow-via-decrypt-revision6hash","name":"VulnCheck Advisory: Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.3,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"Stack-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-08T19:51:12.884Z"},"datePublic":"2026-10-05T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:freedesktop:poppler:*:*:*:*:*:*:*:*","versionStartIncluding":"0.42.0","versionEndIncluding":"26.10.0"}]}]}],"credits":[{"lang":"en","value":"Aziz Elbelaychy (Ostorlab)","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-14T14:50:23.158769Z","id":"CVE-2026-107705","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T16:05:29.301Z"}}]}}}