{"id":"CVE-2026-71870","title":"pypdf is a free and open-source pure-python PDF library","summary":"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 fo…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-400","CWE-770"],"vendor":"pypdf_project","product":"pypdf","affected":["pypdf < 6.15.0"],"patched":["pypdf 6.15.0"],"published":"2026-08-07","updated":"2026-10-05","sourceUpdated":"2026-10-05T17:41:13.103","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71870","references":[{"url":"https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/pull/3944","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.15.0","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-fp3f-mc75-235c"},{"url":"https://github.com/py-pdf/pypdf"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71870.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-71870"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512627"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71870"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71870"}],"tags":["nvd","ghsa","pip","osv","csaf","vex","red-hat","score-dispute"],"epss":0.00125,"epssPercentile":0.02215,"aliases":["GHSA-fp3f-mc75-235c","PYSEC-2026-3655"],"ecosystem":"pip","ingestedAt":"2026-08-07T20:16:41.557Z","scores":{"nvd":3.3,"vendor":5.5},"slug":"CVE-2026-71870","body":"## Overview\n\npypdf 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.\n\n## Affected\n\n- `pypdf < 6.15.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `pypdf 6.15.0`\n\n## Package advisory (CVE-2026-71870)\n\nAffected packages:\n\n- `pypdf < 6.15.0`\n\nPatched in:\n\n- `pypdf 6.15.0`\n\nSource: https://github.com/advisories/GHSA-fp3f-mc75-235c\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Exploit Intelligence, Lightspeed Core, OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI), … · no fix planned: Exploit Intelligence, Red Hat Ansible Automation Platform 2, Red Hat Quay 3, Lightspeed Core, … · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71870.json)","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":215957,"id":"CVE-2026-71870","ts":1791225013288,"field":"cvss","old":null,"new":"3.3"},{"seq":215956,"id":"CVE-2026-71870","ts":1791225013288,"field":"severity","old":"medium","new":"low"}]}