{"id":"CVE-2026-91814","aliases":["EUVD-2026-85159","GHSA-c9r7-69j9-jq5j"],"status":"published","title":"Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content","description":"A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00098,"percentile":0.00775,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2026-09-23T07:49:25Z","modified":"2026-10-29T17:15:42Z","products":[{"vendor":"foxit","product":"pdf_editor"},{"vendor":"foxit","product":"pdf_reader"},{"vendor":"foxit software inc.","product":"foxit pdf editor"},{"vendor":"foxit software inc.","product":"foxit pdf reader"}],"references":[{"url":"https://www.foxit.com/support/security-bulletins.html","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91814"},{"url":"https://github.com/advisories/GHSA-c9r7-69j9-jq5j"}],"sources":{"cve":[{"id":"CVE-2026-91814","title":"Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content","description":"A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.","status":"published","published":"2026-09-23T07:49:25.079Z","modified":"2026-09-23T14:24:20.763Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:19:52.773089Z"}],"euvd":[{"id":"EUVD-2026-85159","description":"A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.","status":"published","published":"2026-09-23T07:49:25Z","modified":"2026-09-23T14:24:20Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T17:28:00.949397Z"}],"ghsa":[{"id":"GHSA-c9r7-69j9-jq5j","title":"A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of...","description":"A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.","status":"published","published":"2026-09-23T09:30:30Z","modified":"2026-09-23T09:30:37Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:12:19.869437Z"}],"nvd":[{"id":"CVE-2026-91814","description":"A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.","status":"published","published":"2026-09-23T08:17:13.673Z","modified":"2026-10-29T17:15:42.253Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:12:50.703874Z"}]}}