{"id":"CVE-2026-41313","aliases":["CLSA-2026-1781225618","CLSA-2026-1791448168","DEBIAN-CVE-2026-41313","EUVD-2026-25114","GHSA-4pxv-j86v-mhcw","GHSA-7gw9-cf7v-778f","GHSA-jj6c-8h6c-hppx","PYSEC-2026-3007","ROOT-APP-PYPI-CVE-2026-41313","ROOT-APP-PYPI-GHSA-4pxv-j86v-mhcw","UBUNTU-CVE-2026-41313"],"status":"published","title":"pypdf: Possible long runtimes for wrong size values in incremental mode","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","severity":{"version":"4.0","score":4.8,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00214,"percentile":0.11815,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-834"],"published":"2026-04-16T21:30:12Z","modified":"2026-11-04T02:47:26Z","fixes":[{"ecosystem":"PyPI","package":"pypdf","fixed_in":["6.10.2"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:PyPI","package":"pypdf","fixed_in":["5.9.0.post5+tuxcare","5.9.0.post19+tuxcare"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pypdf","fixed_in":["6.19.0-1"],"sources":["osv"]},{"ecosystem":"Root:PyPI","package":"pypdf","fixed_in":["6.6.0+aikido.7","6.10.1+aikido.3","6.6.0+aikido.8","6.6.0+aikido.9","6.6.0+aikido.10","6.10.1+aikido.4","6.10.1+aikido.5","6.6.0+aikido.11","6.6.0+aikido.12","6.10.1+aikido.6","6.10.1+aikido.7","6.6.0+aikido.13","6.6.0+aikido.14","6.10.1+aikido.8","6.10.1+aikido.9","6.6.0+aikido.15","6.10.1+aikido.10"],"sources":["osv"]},{"ecosystem":"Root:PyPI","package":"rootio-pypdf","fixed_in":["6.10.1+root.io.2","6.6.0+root.io.7","6.10.1+root.io.3","6.6.0+root.io.8","6.6.0+root.io.9","6.6.0+root.io.10","6.10.1+root.io.4","6.10.1+root.io.5","6.6.0+root.io.11","6.10.1+root.io.1","6.6.0+root.io.6"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.10.2"}]}]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.9.0"},{"fixed":"5.9.0.post5+tuxcare"}]}],"versions":["5.9.0","5.9.0.post1+tuxcare","5.9.0.post2+tuxcare","5.9.0.post3+tuxcare","5.9.0.post4+tuxcare"]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.9.0"},{"fixed":"5.9.0.post19+tuxcare"}]}],"versions":["5.9.0","5.9.0.post1+tuxcare","5.9.0.post10+tuxcare","5.9.0.post11+tuxcare","5.9.0.post12+tuxcare","5.9.0.post13+tuxcare","5.9.0.post14+tuxcare","5.9.0.post15+tuxcare","5.9.0.post16+tuxcare","5.9.0.post17+tuxcare","5.9.0.post18+tuxcare","5.9.0.post2+tuxcare","5.9.0.post3+tuxcare","5.9.0.post4+tuxcare","5.9.0.post5+tuxcare","5.9.0.post6+tuxcare","5.9.0.post7+tuxcare","5.9.0.post8+tuxcare","5.9.0.post9+tuxcare"]},{"source":"osv","ecosystem":"Debian:12","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.17.4-1","3.4.1-1","3.4.1-1+deb12u1","4.0.0-1","4.0.0-1~exp1","4.0.1-1","4.0.2-1","4.1.0-1","4.2.0-1","4.3.1-1","5.4.0-1","6.19.0-1","6.21.0-1","6.21.1-1","6.21.4-1","6.9.0-1","6.9.2-1","6.9.2-2"]},{"source":"osv","ecosystem":"Debian:13","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.0-1","6.19.0-1","6.21.0-1","6.21.1-1","6.21.4-1","6.9.0-1","6.9.2-1","6.9.2-2"]},{"source":"osv","ecosystem":"Debian:14","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.19.0-1"}]}],"versions":["5.4.0-1","6.9.0-1","6.9.2-1","6.9.2-2"]},{"source":"osv","ecosystem":"Debian:12","package":"pypdf2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.1-3","2.12.1-3+deb12u1","2.12.1-4"]},{"source":"osv","ecosystem":"PyPI","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.10.2"}]}],"versions":["1.0","1.1","1.10","1.11","1.12","1.13","1.2","1.3","1.4","1.5","1.6","1.7","1.8","1.9","3.1.0","3.10.0","3.11.0","3.11.1","3.12.0","3.12.1","3.12.2","3.13.0","3.14.0","3.15.0","3.15.1","3.15.2","3.15.3","3.15.4","3.15.5","3.16.0","3.16.1","3.16.2","3.16.3","3.16.4","3.17.0","3.17.1","3.17.2","3.17.3","3.17.4","3.2.0","3.2.1","3.3.0","3.4.0","3.4.1","3.5.0","3.5.1","3.5.2","3.6.0","3.7.0","3.7.1","3.8.0","3.8.1","3.9.0","3.9.1","4.0.0","4.0.1","4.0.2","4.1.0","4.2.0","4.3.0","4.3.1","5.0.0","5.0.1","5.1.0","5.2.0","5.3.0","5.3.1","5.4.0","5.5.0","5.6.0","5.6.1","5.7.0","5.8.0","5.9.0","6.0.0","6.1.0","6.1.1","6.1.2","6.1.3","6.10.0","6.10.1","6.2.0","6.3.0","6.4.0","6.4.1","6.4.2","6.5.0","6.6.0","6.6.1","6.6.2","6.7.0","6.7.1","6.7.2","6.7.3","6.7.4","6.7.5","6.8.0","6.9.0","6.9.1","6.9.2"]},{"source":"osv","ecosystem":"PyPI","package":"pypdf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.10.2"}]}],"versions":["1.0","1.1","1.10","1.11","1.12","1.13","1.2","1.3","1.4","1.5","1.6","1.7","1.8","1.9","3.1.0","3.10.0","3.11.0","3.11.1","3.12.0","3.12.1","3.12.2","3.13.0","3.14.0","3.15.0","3.15.1","3.15.2","3.15.3","3.15.4","3.15.5","3.16.0","3.16.1","3.16.2","3.16.3","3.16.4","3.17.0","3.17.1","3.17.2","3.17.3","3.17.4","3.2.0","3.2.1","3.3.0","3.4.0","3.4.1","3.5.0","3.5.1","3.5.2","3.6.0","3.7.0","3.7.1","3.8.0","3.8.1","3.9.0","3.9.1","4.0.0","4.0.1","4.0.2","4.1.0","4.2.0","4.3.0","4.3.1","5.0.0","5.0.1","5.1.0","5.2.0","5.3.0","5.3.1","5.4.0","5.5.0","5.6.0","5.6.1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Advisory","advisory","web","report"]},{"url":"https://github.com/py-pdf/pypdf/pull/3735","tags":["x_refsource_MISC","Issue Tracking","Patch","fix","web","report"]},{"url":"https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.10.2","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41313","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4pxv-j86v-mhcw","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41313.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-41313","tags":["advisory"]},{"url":"https://github.com/py-pdf/pypdf","tags":["package"]},{"url":"https://pypi.org/project/pypdf","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-41313","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-41313","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-41313","title":"pypdf: Possible long runtimes for wrong size values in incremental mode","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","status":"published","published":"2026-04-22T21:04:59.877Z","modified":"2026-04-23T16:24:39.932Z","cvss":[{"version":"4.0","score":4.8,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-834"],"updated_at":"2026-11-02T13:41:08.498858Z"}],"euvd":[{"id":"EUVD-2026-25114","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","status":"published","published":"2026-04-22T21:04:59Z","modified":"2026-04-23T16:24:39Z","cvss":[{"version":"4.0","score":4.8,"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","level":"medium"}],"updated_at":"2026-11-02T19:24:19.171803Z"}],"ghsa":[{"id":"GHSA-4pxv-j86v-mhcw","title":"pypdf: Possible long runtimes for wrong size values in incremental mode","description":"### Impact\nAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode.\n\n### Patches\nThis has been fixed in [pypdf==6.10.2](https://github.com/py-pdf/pypdf/releases/tag/6.10.2).\n\n### Workarounds\nIf you cannot upgrade yet, consider applying the changes from PR [#3735](https://github.com/py-pdf/pypdf/pull/3735).","status":"published","published":"2026-04-16T21:30:12Z","modified":"2026-05-05T15:44:21Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-834"],"updated_at":"2026-11-02T14:40:00.970271Z"}],"nvd":[{"id":"CVE-2026-41313","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","status":"published","published":"2026-04-22T22:16:32.22Z","modified":"2026-11-02T16:06:04.477Z","cvss":[{"version":"4.0","score":4.8,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-834"],"updated_at":"2026-11-02T20:51:32.097902Z"}],"osv":[{"id":"CVE-2026-41313","title":"pypdf: Possible long runtimes for wrong size values in incremental mode","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","status":"published","published":"2026-04-22T21:04:59.877Z","modified":"2026-11-04T02:47:26.829057924Z","cvss":[{"version":"4.0","score":4.8,"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","level":"medium"}],"cwes":["CWE-834"],"updated_at":"2026-11-04T02:53:45.692342Z"},{"id":"DEBIAN-CVE-2026-41313","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","status":"published","published":"2026-04-22T22:16:32.22Z","modified":"2026-11-03T10:00:40.229754349Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T10:27:58.933618Z"},{"id":"GHSA-4pxv-j86v-mhcw","title":"pypdf: Possible long runtimes for wrong size values in incremental mode","description":"### Impact\nAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode.\n\n### Patches\nThis has been fixed in [pypdf==6.10.2](https://github.com/py-pdf/pypdf/releases/tag/6.10.2).\n\n### Workarounds\nIf you cannot upgrade yet, consider applying the changes from PR [#3735](https://github.com/py-pdf/pypdf/pull/3735).","status":"published","published":"2026-04-16T21:30:12Z","modified":"2026-09-10T03:50:42.729754195Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-834"],"updated_at":"2026-11-02T15:46:37.148947Z"},{"id":"PYSEC-2026-3007","title":"pypdf: Possible long runtimes for wrong size values in incremental mode","description":"### Impact\nAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode.\n\n### Patches\nThis has been fixed in [pypdf==6.10.2](https://github.com/py-pdf/pypdf/releases/tag/6.10.2).\n\n### Workarounds\nIf you cannot upgrade yet, consider applying the changes from PR [#3735](https://github.com/py-pdf/pypdf/pull/3735).","status":"published","published":"2026-07-13T15:02:49.213004Z","modified":"2026-07-13T16:33:08.858387048Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T15:52:56.429374Z"},{"id":"UBUNTU-CVE-2026-41313","description":"pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.","status":"published","published":"2026-04-22T22:16:00Z","modified":"2026-10-17T12:58:14.482768285Z","cvss":[{"version":"4.0","score":4.8,"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","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:16.686388Z"},{"id":"CLSA-2026-1781225618","title":"TuxCare security update for pypdf (1 CVE)","description":"TuxCare rebuilt pypdf to address 1 CVE. Fixed in 5.9.0.post5+tuxcare.","status":"published","published":"2026-08-04T14:52:36Z","modified":"2026-10-15T09:48:01.16931075Z","updated_at":"2026-11-02T15:43:45.445699Z"},{"id":"CLSA-2026-1791448168","title":"TuxCare security update for pypdf (6 CVEs)","description":"TuxCare rebuilt pypdf to address 6 CVEs. Fixed in 5.9.0.post19+tuxcare.","status":"published","published":"2026-10-08T08:29:28Z","modified":"2026-10-15T09:47:41.037195416Z","updated_at":"2026-11-02T15:43:49.016976Z"},{"id":"ROOT-APP-PYPI-CVE-2026-41313","title":"CVE-2026-41313 in pypdf - Patched by Root","description":"Root has patched CVE-2026-41313 in the pypdf package for Root:PyPI. Multiple fixed versions available.","status":"published","published":"2026-08-14T15:48:35Z","modified":"2026-08-14T17:00:06.117697097Z","updated_at":"2026-11-02T15:53:28.259095Z"},{"id":"ROOT-APP-PYPI-GHSA-4pxv-j86v-mhcw","title":"GHSA-4pxv-j86v-mhcw in pypdf - Patched by Root","description":"Root has patched GHSA-4pxv-j86v-mhcw in the pypdf package for Root:PyPI. Multiple fixed versions available.","status":"published","published":"2026-08-14T15:48:35Z","modified":"2026-08-14T17:00:12.416754648Z","updated_at":"2026-11-02T15:53:28.259095Z"}]}}