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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-6321

fast-uri vulnerable to path traversal via percent-encoded dot segments

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Status
Published
Published
Updated
Assigning organization
openjs

Description

fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse onto the same normalized path. Applications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed, with a path that appears confined under an allowed prefix normalizing to a different location. Versions <= 3.1.0 are affected. Update to 3.1.1 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 < 3.1.1affected
  • 3.1.1unaffected
pkg:npm/fast-uri

References