UNKNOWN PyPI
pypdf: Possible long runtimes/large memory usage when retrieving outlines
PYSEC-2026-3910 · CVE-2026-84310 · GHSA-23w6-3w8w-8484
Published · Modified
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Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires accessing the outlines of a document with either lots of entries or nested outlines with long re-used nesting paths.
Patches
This has been fixed in pypdf==6.16.1.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3966.
References
- WEB https://github.com/py-pdf/pypdf/security/advisories/GHSA-23w6-3w8w-8484
- WEB https://github.com/py-pdf/pypdf/pull/3966
- WEB https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942
- PACKAGE https://github.com/py-pdf/pypdf
- WEB https://github.com/py-pdf/pypdf/releases/tag/6.16.1
- PACKAGE https://pypi.org/project/pypdf
- ADVISORY https://github.com/advisories/GHSA-23w6-3w8w-8484
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-84310
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