CVE-2026-28351

UNKNOWN 0.0

Manipulated RunLengthDecode streams can exhaust RAM

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

CWE	CWE-400
Vendor	py-pdf
Product	pypdf
Published	Feb 27, 2026
Last Updated	Mar 3, 2026

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Affected Versions

py-pdf / pypdf

< 6.7.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg github.com: https://github.com/py-pdf/pypdf/pull/3664 github.com: https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.7.4