Is rack affected by CVE-2025-61919?

RubyGems rack is affected in =3.0 =3.2 <3.2.3.

Is CVE-2025-61919 being exploited?

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

high

CVE-2025-61919

Q: Is CVE-2025-61919 being exploited?

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

RubyGems · rack

Summary

Rack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing

Severity: high
EPSS: 0.6% (p44)
Also known as: GHSA-6xw4-3v39-52mm
Published: 2025-10-10

References

https://github.com/rack/rack/security/advisories/GHSA-6xw4-3v39-52mm
https://nvd.nist.gov/vuln/detail/CVE-2025-61919
https://github.com/rack/rack/commit/4e2c903991a790ee211a3021808ff4fd6fe82881

Related advisories

CVE-2022-30123 — critical · RubyGems/rack
CVE-2026-34829 — high · RubyGems/rack
CVE-2026-34230 — high · RubyGems/rack
CVE-2026-34827 — high · RubyGems/rack
CVE-2026-34785 — high · RubyGems/rack
CVE-2026-22860 — high · RubyGems/rack
CVE-2025-61772 — high · RubyGems/rack
CVE-2025-61771 — high · RubyGems/rack

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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.