{"id":"CVE-2026-77467","state":"PUBLISHED","title":"Lychee: A single 383-byte PDF causes ~184 seconds of CPU consumption in the real processing path","description":"Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee enables ImageMagick PDF support with Ghostscript but does not apply an effective pre-render limit to PDF page dimensions in ImagickHandler::loadPdf(). An authenticated user who can upload a small PDF with an oversized /MediaBox can cause Imagick::readImage() to consume substantial CPU before failing to produce an image. When QUEUE_CONNECTION selects synchronous processing the request can occupy a web worker, while the official asynchronous Docker configuration can clog the shared image-processing queue and delay other work. The advisory did not identify a Ghostscript sandbox escape. This issue is fixed in version 7.7.0.","publishedAt":"2026-10-15T16:34:35.236Z","updatedAt":"2026-10-20T02:50:18.889Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["LycheeOrg Lychee"],"affected":[{"vendor":"LycheeOrg","product":"Lychee","versions":[{"version":"< 7.7.0","status":"affected"}]}],"references":["https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79","https://github.com/LycheeOrg/Lychee/pull/4511","https://github.com/LycheeOrg/Lychee/commit/1e92846af4c2d259a225cf4517de17efba04f945","https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0"],"weaknesses":["CWE-400","CWE-770"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77467.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77467","state":"PUBLISHED","datePublished":"2026-10-15T16:34:35.236Z","dateUpdated":"2026-10-20T02:50:18.889Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-20T20:07:49.962Z"},"containers":{"cna":{"title":"Lychee: A single 383-byte PDF causes ~184 seconds of CPU consumption in the real processing path","descriptions":[{"lang":"en","value":"Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee enables ImageMagick PDF support with Ghostscript but does not apply an effective pre-render limit to PDF page dimensions in ImagickHandler::loadPdf(). An authenticated user who can upload a small PDF with an oversized /MediaBox can cause Imagick::readImage() to consume substantial CPU before failing to produce an image. When QUEUE_CONNECTION selects synchronous processing the request can occupy a web worker, while the official asynchronous Docker configuration can clog the shared image-processing queue and delay other work. The advisory did not identify a Ghostscript sandbox escape. This issue is fixed in version 7.7.0."}],"affected":[{"vendor":"LycheeOrg","product":"Lychee","versions":[{"version":"< 7.7.0","status":"affected"}]}],"references":[{"url":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79","name":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/LycheeOrg/Lychee/pull/4511","name":"https://github.com/LycheeOrg/Lychee/pull/4511","tags":["x_refsource_MISC"]},{"url":"https://github.com/LycheeOrg/Lychee/commit/1e92846af4c2d259a225cf4517de17efba04f945","name":"https://github.com/LycheeOrg/Lychee/commit/1e92846af4c2d259a225cf4517de17efba04f945","tags":["x_refsource_MISC"]},{"url":"https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0","name":"https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-15T16:34:35.236Z"},"source":{"advisory":"GHSA-6736-fhxv-3p79","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T02:49:32.958809Z","id":"CVE-2026-77467","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T02:50:18.889Z"}}]}}}