UNKNOWN PyPI
pypdf: Possible long runtimes/large memory usage when extracting XForm objects
PYSEC-2026-3911 · CVE-2026-84311 · GHSA-763m-79hh-57f2
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 extracting the text of a page with lots of XForm objects, where some of them might be re-used.
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-763m-79hh-57f2
- 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-763m-79hh-57f2
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-84311
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