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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-6322

fast-uri vulnerable to host confusion via percent-encoded authority delimiters

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Status
Published
Published
Updated
Assigning organization
openjs

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

fast-uri fast-uri

Default version status: unaffected

  • 0 to < 3.1.2affected
  • 3.1.2unaffected
pkg:npm/fast-uri

References