PyPI/pypdf CVE-2025-55197: medium, EPSS 0.48%

PyPDF's Manipulated FlateDecode streams can exhaust RAM

Action: Upgrade pypdf to 6.0.0 or later.

pip install pypdf==6.0.0

Affected

Fixed versions

Sources

• osv: GHSA-7hfw-26vp-jp8m
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-7hfw-26vp-jp8m
• https://nvd.nist.gov/vuln/detail/CVE-2025-55197
• https://github.com/py-pdf/pypdf/issues/3429
• https://github.com/py-pdf/pypdf/pull/3430
• https://github.com/py-pdf/pypdf
• https://github.com/py-pdf/pypdf/blob/0dd57738bbdcdb63f0fb43d8a6b3d222b6946595/pypdf/filters.py#L72-L143
• https://github.com/py-pdf/pypdf/releases/tag/6.0.0

CVE-2025-55197 · published 2025-08-13T19:51:24Z · modified 2026-09-10T03:50:26.651449913Z · JSON