VULNERABILITY INTELLIGENCE

CVE-2026-6322

CVSS score7.5 HIGH
EPSS probability0.51%
CISA KEVNot currently listed
Published2026-05-05
Last modified2026-09-10
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • CWE-140: Improper Neutralization of Delimiters
  • CWE-436: Interpretation Conflict

Primary references