{"id":"CVE-2026-6540","title":"Calico's Application Layer Policy (disabled by default), which enforces HTTP rules through Dikastes, fails to perform URL path normalization","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22","CWE-23"],"vendor":"tigera","product":"calico","affected":["calico < 3.21.7","calico < 3.31.6","calico <= 22.4.0","calico >= 3.22.0, < 3.22.4","calico >= 3.32.0, < 3.32.1"],"patched":["calico 3.32.1"],"published":"2026-07-30","updated":"2026-08-08","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6540","references":[{"url":"https://github.com/projectcalico/calico/pull/12531","label":"psirt@tigera.io"},{"url":"https://github.com/projectcalico/calico/pull/12532","label":"psirt@tigera.io"},{"url":"https://github.com/projectcalico/calico/pull/12533","label":"psirt@tigera.io"},{"url":"https://www.tigera.io/security-bulletins/tta-2026-005/","label":"psirt@tigera.io"}],"tags":["nvd"],"epss":0.00367,"epssPercentile":0.30547,"ingestedAt":"2026-08-08T13:22:52.581Z","slug":"CVE-2026-6540","body":"## Overview\n\nCalico'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.\n\n## Affected\n\n- `calico < 3.21.7`\n- `calico < 3.31.6`\n- `calico <= 22.4.0`\n- `calico >= 3.22.0, < 3.22.4`\n- `calico >= 3.32.0, < 3.32.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `calico 3.32.1`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}