{"id":"CVE-2026-71870","state":"PUBLISHED","title":"pypdf: Possible large memory usage for large /ToUnicode streams","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.","publishedAt":"2026-08-07T19:28:26.178Z","updatedAt":"2026-08-10T12:24:22.451Z","severity":{"score":4.8,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["py-pdf pypdf"],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.15.0","status":"affected"}]}],"references":["https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c","https://github.com/py-pdf/pypdf/pull/3944","https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa","https://github.com/py-pdf/pypdf/releases/tag/6.15.0"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71870.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71870","state":"PUBLISHED","datePublished":"2026-08-07T19:28:26.178Z","dateUpdated":"2026-08-10T12:24:22.451Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-07T18:26:53.524Z"},"containers":{"cna":{"title":"pypdf: Possible large memory usage for large /ToUnicode streams","descriptions":[{"lang":"en","value":"pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0."}],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.15.0","status":"affected"}]}],"references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c","name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/py-pdf/pypdf/pull/3944","name":"https://github.com/py-pdf/pypdf/pull/3944","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa","name":"https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.15.0","name":"https://github.com/py-pdf/pypdf/releases/tag/6.15.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":4.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","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":"2026-08-07T19:28:26.178Z"},"source":{"advisory":"GHSA-fp3f-mc75-235c","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-10T12:04:06.963067Z","id":"CVE-2026-71870","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":"2026-08-10T12:24:22.451Z"}}]}}}