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