{"id":"CVE-2026-71852","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 long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font…","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-834","CWE-1050"],"vendor":"pypdf_project","product":"pypdf","affected":["pypdf < 6.15.0"],"patched":["pypdf 6.15.0"],"published":"2026-08-07","updated":"2026-10-05","sourceUpdated":"2026-10-05T17:32:03.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71852","references":[{"url":"https://github.com/py-pdf/pypdf/commit/51cb6acf9e8a35b77e90b4d87d28fe3e1416d7d7","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/pull/3946","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-fwg2-594c-jp42","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71852.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-71852"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512615"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71852"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71852"}],"tags":["nvd","osv","pip","csaf","vex","red-hat","score-dispute"],"epss":0.00125,"epssPercentile":0.02215,"aliases":["GHSA-fwg2-594c-jp42","PYSEC-2026-3656"],"ecosystem":"pip","ingestedAt":"2026-08-07T19:14:14.302Z","scores":{"nvd":3.3,"vendor":5.5},"slug":"CVE-2026-71852","body":"## Overview\n\npypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font /W width ranges or excessive width entries 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-2026-71852)\n\nAffected packages:\n\n- `pypdf < 6.15.0`\n\nPatched in:\n\n- `pypdf 6.15.0`\n\nSource: https://osv.dev/vulnerability/GHSA-fwg2-594c-jp42\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-2026-71852.json)","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":215955,"id":"CVE-2026-71852","ts":1791225012943,"field":"cvss","old":null,"new":"3.3"},{"seq":215954,"id":"CVE-2026-71852","ts":1791225012943,"field":"severity","old":"medium","new":"low"}]}