Regular Expression Denial of Service in Headers
Published 16 Feb 2023 · Updated 10 Sept 2026
Affected package
- Affected
- <5.19.1
- Fixed in
- 5.19.1
npm install undici@5.19.1Details
Impact
The Headers.set() and Headers.append() methods are vulnerable to Regular Expression Denial of Service (ReDoS) attacks when untrusted values are passed into the functions. This is due to the inefficient regular expression used to normalize the values in the headerValueNormalize() utility function.
Patches
This vulnerability was patched in v5.19.1.
Workarounds
There is no workaround. Please update to an unaffected version.
References
- https://hackerone.com/bugs?report_id=1784449
Credits
Carter Snook reported this vulnerability.
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References
- Linkgithub.com/nodejs/undici/security/advisories/GHSA-r6ch-mqf9-qc9w
- Advisorynvd.nist.gov/vuln/detail/CVE-2023-24807
- Linkgithub.com/nodejs/undici/commit/f2324e549943f0b0937b09fb1c0c16cc7c93abdf
- Packagegithub.com/nodejs/undici
- Linkgithub.com/nodejs/undici/releases/tag/v5.19.1
- Linkhackerone.com/bugs?report_id=1784449
Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.