Is starlette affected by CVE-2025-54121?

PyPI starlette is affected in <0.47.2.

Is CVE-2025-54121 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

medium

CVE-2025-54121

Q: Is CVE-2025-54121 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

PyPI · starlette

Summary

Starlette has possible denial-of-service vector when parsing large files in multipart forms

Severity: medium
EPSS: 0.5% (p40)
Also known as: GHSA-2c2j-9gv5-cj73
Published: 2025-07-21

References

https://github.com/encode/starlette/security/advisories/GHSA-2c2j-9gv5-cj73
https://nvd.nist.gov/vuln/detail/CVE-2025-54121
https://github.com/encode/starlette/commit/9f7ec2eb512fcc3fe90b43cb9dd9e1d08696bec1

Related advisories

CVE-2026-54283 — high · PyPI/starlette
CVE-2026-48818 — high · PyPI/starlette
CVE-2025-62727 — high · PyPI/starlette
CVE-2026-48817 — medium · PyPI/starlette
CVE-2026-48710 — medium · PyPI/starlette

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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.