pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.
Metrics
Affected Vendors & Products
References
History
Thu, 29 Jan 2026 00:15:00 +0000
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threat_severity
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cvssV3_1
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Wed, 28 Jan 2026 12:30:00 +0000
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Py-pdf
Py-pdf pypdf |
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| Vendors & Products |
Py-pdf
Py-pdf pypdf |
Tue, 27 Jan 2026 21:15:00 +0000
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ssvc
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Tue, 27 Jan 2026 20:00:00 +0000
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| Description | pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually. | |
| Title | pypdf has possible Infinite Loop when processing outlines/bookmarks | |
| Weaknesses | CWE-835 | |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-01-27T19:44:06.173Z
Updated: 2026-01-27T20:51:48.030Z
Reserved: 2026-01-23T20:40:23.389Z
Link: CVE-2026-24688
Updated: 2026-01-27T20:35:55.665Z
Status : Awaiting Analysis
Published: 2026-01-27T20:16:24.193
Modified: 2026-01-29T16:31:35.700
Link: CVE-2026-24688