CVE-2026-102999: pypdf: Possible long runtimes with large amount of embedded files

October 1, 2026

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing the embedded files through the dictionary-based API.

References

github.com/advisories/GHSA-v247-6f48-mgcj
github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3
github.com/py-pdf/pypdf/pull/4081
github.com/py-pdf/pypdf/releases/tag/6.19.0
github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj
nvd.nist.gov/vuln/detail/CVE-2026-102999

Code Behaviors & Features

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