CVE-2026-31826

UNKNOWN 0.0

pypdf: manipulated stream length values 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 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream with a rather large /Length value, regardless of the actual data length inside the stream. This vulnerability is fixed in 6.8.0.

CWE	CWE-770
Vendor	py-pdf
Product	pypdf
Published	Mar 10, 2026
Last Updated	Mar 11, 2026

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Affected Versions

py-pdf / pypdf

< 6.8.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-hqmh-ppp3-xvm7 github.com: https://github.com/py-pdf/pypdf/pull/3675 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.8.0