CVE-2026-6322

Aliases:GHSA-v39h-62p7-jpjc
Advisory lineage Upstream: 0 Downstream: 4
Analyzed
Published: 05 May 2026, 10:29
Last modified:22 Jul 2026, 12:08

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.47% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

05 May 2026, 10:29
Published
Vulnerability first disclosed
22 Jul 2026, 12:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Trends

Current EPSS score: 0.47%• Percentile: 38%

Techniques & Countermeasures

  • CWE-436•Interpretation Conflict

    Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.

  • CWE-140•Improper Neutralization of Delimiters

    The product does not neutralize or incorrectly neutralizes delimiters.

Affected Systems

  • fast-uri•fast-uri

    < 3.1.2

  • Npm•fast-uri

    < 3.1.2

  • openjsf•fast-uri

    < 3.1.2

References (37)