UNKNOWN PyPI
pypdf has possible long runtimes/large memory usage for large /ToUnicode streams
GHSA-wgvp-vg3v-2xq3 · CVE-2026-27025 · PYSEC-2026-3024
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 parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction.
Patches
This has been fixed in pypdf==6.7.1.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3646.
References
- WEB https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-27025
- WEB https://github.com/py-pdf/pypdf/pull/3646
- WEB https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2
- PACKAGE https://github.com/py-pdf/pypdf
- WEB https://github.com/py-pdf/pypdf/releases/tag/6.7.1
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