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CVSS 7.5 · High
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I. Basic Information for CVE-2026-6321
Vulnerability Information

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Vulnerability Title
fast-uri vulnerable to path traversal via percent-encoded dot segments
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
fast-urifast-uri 0 ~ 3.1.1 -
II. Public POCs for CVE-2026-6321
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III. Intelligence Information for CVE-2026-6321
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IV. Related Vulnerabilities
V. Comments for CVE-2026-6321

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