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.
Published: 2026-07-30
Score: 7.9 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 30 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 30 Jul 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Tigera
Tigera calico
Tigera calico Cloud
Tigera calico Enterprise
Vendors & Products Tigera
Tigera calico
Tigera calico Cloud
Tigera calico Enterprise

Thu, 30 Jul 2026 15:00:00 +0000

Type Values Removed Values Added
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.
Title L7 policy bypass via unnormalized HTTP path matching
Weaknesses CWE-22
CWE-23
References
Metrics cvssV4_0

{'score': 7.9, 'vector': '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'}


Subscriptions

Tigera Calico Calico Cloud Calico Enterprise
cve-icon MITRE

Status: PUBLISHED

Assigner: Tigera

Published:

Updated: 2026-07-30T16:12:07.691Z

Reserved: 2026-04-17T17:41:32.750Z

Link: CVE-2026-6540

cve-icon Vulnrichment

Updated: 2026-07-30T16:12:04.481Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-30T16:45:03Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

  • CWE-23

    Relative Path Traversal