Summary
Uncontrolled recursion leads to abort in deserialization
Affected versions of this crate did not properly check for recursion while deserializing aliases. This allows an attacker to make a YAML file with an alias referring to itself causing an abort. The flaw was corrected by checking the recursion depth.
Impact
Affected versions
Security releases
Kodem intelligence
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. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is GHSA-39VW-QP34-RMWF? GHSA-39VW-QP34-RMWF is a medium-severity security vulnerability in serde_yaml (rust), affecting versions >= 0.6.0-rc1, < 0.8.4. It is fixed in 0.8.4.
- Which versions of serde_yaml are affected by GHSA-39VW-QP34-RMWF? serde_yaml (rust) versions >= 0.6.0-rc1, < 0.8.4 is affected.
- Is there a fix for GHSA-39VW-QP34-RMWF? Yes. GHSA-39VW-QP34-RMWF is fixed in 0.8.4. Upgrade to this version or later.
- Is GHSA-39VW-QP34-RMWF exploitable, and should I be worried? Whether GHSA-39VW-QP34-RMWF 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
- What actually determines whether GHSA-39VW-QP34-RMWF is exploitable, and how bad it is? 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.
- How do I fix GHSA-39VW-QP34-RMWF? Upgrade
serde_yamlto 0.8.4 or later.