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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-6540 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  Tigera, Inc.
CVSS-B 7.9 HIGH
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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/projectcalico/calico/pull/12531 Tigera, Inc.
https://github.com/projectcalico/calico/pull/12532 Tigera, Inc.
https://github.com/projectcalico/calico/pull/12533 Tigera, Inc.
https://www.tigera.io/security-bulletins/tta-2026-005/ Tigera, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Tigera, Inc.  
CWE-23 Relative Path Traversal Tigera, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-6540
NVD Published Date:
07/30/2026
NVD Last Modified:
07/30/2026
Source:
Tigera, Inc.