Is pypdf affected by CVE-2025-55197?

PyPI pypdf is affected in <6.0.0.

Is CVE-2025-55197 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

medium

CVE-2025-55197

Q: Is CVE-2025-55197 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

PyPI · pypdf

Summary

PyPDF's Manipulated FlateDecode streams can exhaust RAM

Severity: medium
EPSS: 0.4% (p32)
Also known as: GHSA-7hfw-26vp-jp8m
Published: 2025-08-13

References

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

Related advisories

GHSA-jm82-fx9c-mx94 — medium · PyPI/pypdf
CVE-2026-54531 — medium · PyPI/pypdf
CVE-2026-54530 — medium · PyPI/pypdf
CVE-2026-49461 — medium · PyPI/pypdf
CVE-2026-49460 — medium · PyPI/pypdf
CVE-2026-48735 — medium · PyPI/pypdf
CVE-2026-48156 — medium · PyPI/pypdf
CVE-2026-48155 — medium · PyPI/pypdf

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.