Is puma affected by CVE-2021-41136?

RubyGems puma is affected in >=5.0.0 <5.5.1, <4.3.9.

Is CVE-2021-41136 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 1.1%.

low

CVE-2021-41136

Q: Is CVE-2021-41136 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 1.1%.

RubyGems · puma

Summary

Puma with proxy which forwards LF characters as line endings could allow HTTP request smuggling

Severity: low
EPSS: 1.1% (p62)
Also known as: GHSA-48w2-rm65-62xx
Published: 2021-10-12

References

https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
https://nvd.nist.gov/vuln/detail/CVE-2021-41136
https://github.com/puma/puma/commit/436c71807f00e07070902a03f79fd3e130eb6b18

Related advisories

CVE-2023-40175 — critical · RubyGems/puma
CVE-2022-24790 — critical · RubyGems/puma
CVE-2026-47737 — high · RubyGems/puma
CVE-2026-47736 — high · RubyGems/puma
CVE-2022-23634 — high · RubyGems/puma
CVE-2021-29509 — high · RubyGems/puma
CVE-2020-11076 — high · RubyGems/puma
CVE-2024-45614 — medium · RubyGems/puma

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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.