{"schema":"threatline.record/2","record":{"id":"CVE-2026-103000","aliases":["GHSA-w23x-9jrw-r45c","PYSEC-2026-4160"],"summary":"pypdf: Possible large memory usage when retrieving alphabetical page labels","details":"### Impact\n\nAn attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing the page labels of a document with large alphabetical labels.\n\n### Patches\n\nThis has been fixed in [pypdf==6.19.0](https://github.com/py-pdf/pypdf/releases/tag/6.19.0).\n\n### Workarounds\n\nIf you cannot upgrade yet, consider applying the changes from PR [#4096](https://github.com/py-pdf/pypdf/pull/4096).","categories":["Libraries & packages"],"product":"pypdf","vendor":"py-pdf","ecosystem":"pip","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-w23x-9jrw-r45c","source_modified_at":"2026-10-01T15:07:09Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"pypdf"},"range":"< 6.19.0"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-103000","source_modified_at":"2026-09-30T20:49:21.058Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"pypdf","vendor":"py-pdf","versions":[{"version":"< 6.19.0","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-w23x-9jrw-r45c","source_modified_at":"2026-10-01T17:56:15.557598717Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"6.19.0"}],"type":"ECOSYSTEM"}],"versions":["1.0","1.1","1.10","1.11","1.12","1.13","1.2","1.3","1.4","1.5","1.6","1.7","1.8","1.9","3.1.0","3.10.0","3.11.0","3.11.1","3.12.0","3.12.1","3.12.2","3.13.0","3.14.0","3.15.0","3.15.1","3.15.2","3.15.3","3.15.4","3.15.5","3.16.0","3.16.1","3.16.2","3.16.3","3.16.4","3.17.0","3.17.1","3.17.2","3.17.3","3.17.4","3.2.0","3.2.1","3.3.0","3.4.0","3.4.1","3.5.0","3.5.1","3.5.2","3.6.0","3.7.0","3.7.1"]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-w23x-9jrw-r45c","source_modified_at":"2026-10-01T15:07:09Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"pypdf"},"version":"6.19.0"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-w23x-9jrw-r45c","source_modified_at":"2026-10-01T17:56:15.557598717Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf"},"version":"6.19.0"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00345,"percentile":0.26812,"score_date":"2026-10-23"},"published_at":"2026-09-30T20:13:00.379Z","modified_at":"2026-10-01T17:56:15.557598717Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-w23x-9jrw-r45c","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-01T15:07:09Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-103000","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-09-30T20:49:21.058Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-w23x-9jrw-r45c","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-01T17:56:15.557598717Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-103000","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-w23x-9jrw-r45c","tags":["x_refsource_CONFIRM"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103000","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/py-pdf/pypdf/pull/4096","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/py-pdf/pypdf/commit/0d8b5a8832cde1ba308b5c27567b879b7b7eed4a","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/py-pdf/pypdf/releases/tag/6.19.0","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-w23x-9jrw-r45c","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-30T20:49:14.062135Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-01T17:56:15.557598717Z","content_hash":"113bd35ef8dadbcf9ff09d084a0223fc60532f98bb942fc4647b2c7428ff60b5"}}