{"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":"medium","cwe":["CWE-834"],"vendor":"pypdf","product":"pypdf","affected":["pypdf < 6.15.0"],"patched":["pypdf 6.15.0"],"published":"2026-08-07","updated":"2026-09-10","sourceUpdated":"2026-09-10T20:30:11.423","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"}],"tags":["nvd","osv","pip"],"epss":0.00127,"epssPercentile":0.02694,"aliases":["GHSA-fwg2-594c-jp42","PYSEC-2026-3656"],"ecosystem":"pip","ingestedAt":"2026-08-07T19:14:14.302Z","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## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\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","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}