{"id":"CVE-2026-22690","state":"PUBLISHED","title":"pypdf has possible long runtimes for missing /Root object with large /Size values","description":"pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.","publishedAt":"2026-01-10T04:41:20.773Z","updatedAt":"2026-01-12T17:07:00.323Z","severity":{"score":2.7,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U","source":"GitHub_M"},"assigner":"GitHub_M","products":["py-pdf pypdf"],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.6.0","status":"affected"}]}],"references":["https://github.com/py-pdf/pypdf/security/advisories/GHSA-4xc4-762w-m6cg","https://github.com/py-pdf/pypdf/pull/3594","https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45","https://github.com/py-pdf/pypdf/releases/tag/6.6.0"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/22xxx/CVE-2026-22690.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-22690","state":"PUBLISHED","datePublished":"2026-01-10T04:41:20.773Z","dateUpdated":"2026-01-12T17:07:00.323Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-08T19:23:09.854Z"},"containers":{"cna":{"title":"pypdf has possible long runtimes for missing /Root object with large /Size values","descriptions":[{"lang":"en","value":"pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0."}],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.6.0","status":"affected"}]}],"references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-4xc4-762w-m6cg","name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-4xc4-762w-m6cg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/py-pdf/pypdf/pull/3594","name":"https://github.com/py-pdf/pypdf/pull/3594","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45","name":"https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.6.0","name":"https://github.com/py-pdf/pypdf/releases/tag/6.6.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.7,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-10T04:41:20.773Z"},"source":{"advisory":"GHSA-4xc4-762w-m6cg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-12T17:06:53.596988Z","id":"CVE-2026-22690","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-12T17:07:00.323Z"}}]}}}