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.
Metrics
Affected Vendors & Products
References
History
Tue, 05 May 2026 13:15:00 +0000
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ssvc
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Tue, 05 May 2026 10:45:00 +0000
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| Description | 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. | |
| Title | fast-uri vulnerable to host confusion via percent-encoded authority delimiters | |
| Weaknesses | CWE-436 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: openjs
Published: 2026-05-05T10:29:16.378Z
Updated: 2026-05-05T12:55:43.750Z
Reserved: 2026-04-14T20:28:09.160Z
Link: CVE-2026-6322
Updated: 2026-05-05T12:55:34.327Z
Status : Received
Published: 2026-05-05T11:16:33.360
Modified: 2026-05-05T11:16:33.360
Link: CVE-2026-6322
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