CVE-2022-24790 is a critical-severity security vulnerability in puma (rubygems), affecting versions >= 5.0.0, < 5.6.4. It is fixed in 5.6.4, 4.3.12.
When using Puma behind a proxy that does not properly validate that the incoming HTTP request matches the RFC7230 standard, Puma and the frontend proxy may disagree on where a request starts and ends. This would allow requests to be smuggled via the front-end proxy to Puma. The following vulnerabilities are addressed by this advisory: Lenient parsing of Transfer-Encoding headers, when unsupported encodings should be rejected and the final encoding must be chunked. Lenient parsing of malformed Content-Length headers and chunk sizes, when only digits and hex digits should be allowed. Lenient parsing of duplicate Content-Length headers, when they should be rejected. Lenient parsing of the ending of chunked segments, when they should end with \r\n. The vulnerability has been fixed in 5.6.4 and 4.3.12. When deploying a proxy in front of Puma, turning on any and all functionality to make sure that the request matches the RFC7230 standard. These proxy servers are known to have "good" behavior re: this standard and upgrading Puma may not be necessary. Users are encouraged to validate for themselves. Nginx (latest) Apache (latest) Haproxy 2.5+ Caddy (latest) Traefik (latest)
CVE-2022-24790 has a CVSS score of 9.1 (Critical). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (5.6.4, 4.3.12). Upgrading removes the vulnerable code path.
rubygems
puma (>= 5.0.0, < 5.6.4)puma (< 4.3.12)puma → 5.6.4 (rubygems)puma → 4.3.12 (rubygems)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2022-24790 is reachable in your applications. Explore open-source security for your team.
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Upgrade the following packages to resolve this vulnerability:
puma to 5.6.4 or laterpuma to 4.3.12 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2022-24790 is a critical-severity security vulnerability in puma (rubygems), affecting versions >= 5.0.0, < 5.6.4. It is fixed in 5.6.4, 4.3.12.
CVE-2022-24790 has a CVSS score of 9.1 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
puma (rubygems) versions >= 5.0.0, < 5.6.4 is affected.
Yes. CVE-2022-24790 is fixed in 5.6.4, 4.3.12. Upgrade to this version or later.
Whether CVE-2022-24790 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
puma to 5.6.4 or laterpuma to 4.3.12 or later