CVE Database›Document archive›CVE-2026-6321

CVE-2026-6321

fast-uri: fast-uri: Path traversal vulnerability allows bypass of security policies

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · May 5, 2026

Updated · November 5, 2026

Description

A flaw was found in fast-uri. A remote attacker could exploit this vulnerability by providing a specially crafted Uniform Resource Locator (URL) containing percent-encoded path separators and dot segments. Due to incorrect processing, fast-uri would decode these elements before proper normalization, leading to distinct URLs resolving to the same internal path. This could allow an attacker to bypass security policies that rely on path-based comparisons, potentially gaining unauthorized access to resources.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory