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CVE-2026-6540: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Tigera Calico

0
High
VulnerabilityCVE-2026-6540cvecve-2026-6540cwe-22cwe-23
Published: 07/30/2026 (07/30/2026, 14:45:04 UTC)
Source: CVE Database V5
Vendor/Project: Tigera
Product: Calico

Description

Calico's Application Layer Policy (disabled by default), which enforces HTTP rules through Dikastes, fails to perform URL path normalization. As a result, HTTP requests using path-traversal segments, encoded slashes, or repeated slashes are not correctly evaluated by Prefix path rules. Dikastes authorizes the request under the permitted prefix while the downstream workload or a fronting proxy normalizes the path and serves the restricted endpoint. An attacker with network access and no special RBAC can potentially reach HTTP endpoints the policy was intended to restrict.

CVSS v4.0

Score 7.9high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
High
Subsq. Integrity
High
Subsq. Availability
Low
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L

Technical Details

Data Version
5.2
Assigner Short Name
Tigera
Date Reserved
2026-04-17T17:41:32.750Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a6b816b9c2644c7f860ebd8

Added to database: 07/30/2026, 16:52:59 UTC

Last updated: 07/30/2026, 16:52:59 UTC

Views: 1

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