Medium 4.3Published Jan 27, 2026

CVE-2026-24688pypdf is a free and open-source pure-python PDF library.

Updated under an hour ago (2026-10-19 09:10 UTC)

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It affects pypdf_project pypdf. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for pypdf_project pypdf

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-835
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pypdf_project pypdf pypdf_project:pypdf	before 6.6.2	NVD

References

https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1patch
https://github.com/py-pdf/pypdf/pull/3610issue-tracking
https://github.com/py-pdf/pypdf/releases/tag/6.6.2product, release-notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.