CVE-2026-6322

fast-uri normalize() decoded percent-encoded authority delimiters inside the host component and then re-emitted them as raw delimiters during serialization. A host that combined an allowed domain, an encoded at-sign, and a different domain was re-emitted with the at-sign as a raw userinfo separator, changing the URI's authority to the second domain. Applications that normalize untrusted URLs before host allowlist checks, redirect validation, or outbound request routing can be steered to a different authority than the input appeared to specify. Versions <= 3.1.1 are affected. Update to 3.1.2 or later.

Score
CVSS 3.1 7.5 High
Status
Modified - ce714d77-add3-4f53-aff5-83d477b104bb
Published
2026-05-05
Last modified
2026-09-10
Weaknesses
CWE-140, CWE-436

Affected products

References

 
 
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