Is starlette affected by CVE-2025-62727?

PyPI starlette is affected in >=0.39.0 <0.49.1.

Is CVE-2025-62727 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

high

CVE-2025-62727

Q: Is CVE-2025-62727 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

PyPI · starlette

Summary

Starlette vulnerable to O(n^2) DoS via Range header merging in ``starlette.responses.FileResponse``

Severity: high
EPSS: 0.6% (p44)
Also known as: GHSA-7f5h-v6xp-fcq8
Published: 2025-10-28

References

https://github.com/Kludex/starlette/security/advisories/GHSA-7f5h-v6xp-fcq8
https://nvd.nist.gov/vuln/detail/CVE-2025-62727
https://github.com/Kludex/starlette/commit/4ea6e22b489ec388d6004cfbca52dd5b147127c5

Related advisories

CVE-2026-54283 — high · PyPI/starlette
CVE-2026-48818 — high · PyPI/starlette
CVE-2026-48817 — medium · PyPI/starlette
CVE-2026-48710 — medium · PyPI/starlette
CVE-2025-54121 — 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.