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CVE-2026-54531

pypdf: Possible infinite loop when processing outlines/bookmarks in writer

CVSS 6.9 MEDIUMEPSS 0.1%CWE-835
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.0, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with outlines into a writer. This vulnerability is fixed in 6.13.0.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Productos afectados
py-pdf · pypdf

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Referencias
https://github.com/py-pdf/pypdf/pull/3830https://github.com/py-pdf/pypdf/releases/tag/6.13.0https://github.com/py-pdf/pypdf/security/advisories/GHSA-m2v9-299j-rv96