CVE-2022-35948 is a medium-severity security vulnerability in undici (npm), affecting versions <= 5.8.1. It is fixed in 5.8.2.
Impact =< [email protected] users are vulnerable to CRLF Injection on headers when using unsanitized input as request headers, more specifically, inside the content-type header. Example: The above snippet will perform two requests in a single request API call: 1) http://localhost:3000/ 2) http://localhost:3000/foo2 Patches This issue was patched in Undici v5.8.1 Workarounds Sanitize input when sending content-type headers using user input. For more information If you have any questions or comments about this advisory: Open an issue in undici repository To make a report, follow the SECURITY document
CVE-2022-35948 has a CVSS score of 5.3 (Medium). 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 (5.8.2). Upgrading removes the vulnerable code path.
npm
undici (<= 5.8.1)undici → 5.8.2 (npm)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-2022-35948 is reachable in your applications. Explore open-source security for your team.
See if CVE-2022-35948 is reachable in your applications. Get a demo
Upgrade undici to 5.8.2 or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2022-35948 is a medium-severity security vulnerability in undici (npm), affecting versions <= 5.8.1. It is fixed in 5.8.2.
CVE-2022-35948 has a CVSS score of 5.3 (Medium). 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.
undici (npm) versions <= 5.8.1 is affected.
Yes. CVE-2022-35948 is fixed in 5.8.2. Upgrade to this version or later.
Whether CVE-2022-35948 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.
Upgrade undici to 5.8.2 or later.