CVE-2026-59936

pypdf: Possible infinite loop for not terminated inline images

CVSS 8.7 HIGHCWE-400

Vexday Risk Score

18Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS —KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

08 Jul 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

py-pdf · pypdf

References

https://github.com/py-pdf/pypdf/commit/ec3b14596186c40caca7cf8ab9b2155203e01b5b https://github.com/py-pdf/pypdf/pull/3891 https://github.com/py-pdf/pypdf/releases/tag/6.14.1 https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr