CVE-2026-27628

UNKNOWN 0.0

pypdf has a possible infinite loop when loading circular /Prev entries in cross-reference streams

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.

CWE	CWE-835
Vendor	py-pdf
Product	pypdf
Published	Feb 25, 2026
Last Updated	Feb 27, 2026

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Affected Versions

py-pdf / pypdf

< 6.7.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-2rw7-x74f-jg35 github.com: https://github.com/py-pdf/pypdf/issues/3654 github.com: https://github.com/py-pdf/pypdf/commit/f0a462d36971cf077d74492a348d0d06fd60ea4d