SecuriTricks - CVE-2026-6322

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.

Product(s) Impacted

Vendor	Product	Versions
Fast-uri	Fast-uri	<3.1.1

Weaknesses

Common security weaknesses mapped to this vulnerability.

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.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	fast-uri	fast-uri	<3.1.1	/	/	/	/	/	/	/

References

https://cna.openjsf.org/security-advisories.html

https://github.com/fastify/fast-uri/security/advisories/GHSA-v39h-62p7-jpjc

CVSS Score

7.5 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: HIGH
Availability Impact: NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

View Vector String

Timeline

Published: May 5, 2026, 11:16 a.m.
Last Modified: May 5, 2026, 11:16 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

ce714d77-add3-4f53-aff5-83d477b104bb

CVE-2026-6322