{"id":"CVE-2026-6540","aliases":["EUVD-2026-51153","GHSA-gm75-wg2c-p77x"],"status":"published","title":"L7 policy bypass via unnormalized HTTP path matching","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.","severity":{"version":"4.0","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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00539,"percentile":0.45633,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22","CWE-23"],"published":"2026-07-30T14:45:04Z","modified":"2026-10-28T02:30:38Z","products":[{"vendor":"tigera","product":"calico"},{"vendor":"tigera","product":"calico cloud"},{"vendor":"tigera","product":"calico enterprise"}],"references":[{"url":"https://github.com/projectcalico/calico/pull/12531","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://github.com/projectcalico/calico/pull/12532","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://github.com/projectcalico/calico/pull/12533","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://www.tigera.io/security-bulletins/tta-2026-005/","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6540","tags":["advisory"]},{"url":"https://www.tigera.io/security-bulletins/tta-2026-005"},{"url":"https://github.com/advisories/GHSA-gm75-wg2c-p77x"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6540.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-6540","title":"L7 policy bypass via unnormalized HTTP path matching","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.","status":"published","published":"2026-07-30T14:45:04.068Z","modified":"2026-07-30T16:12:07.691Z","cvss":[{"version":"4.0","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","level":"high","assessor":"cna"}],"cwes":["CWE-22","CWE-23"],"updated_at":"2026-11-02T13:50:04.986624Z"}],"euvd":[{"id":"EUVD-2026-51153","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.","status":"published","published":"2026-07-30T14:45:04Z","modified":"2026-07-30T16:12:07Z","cvss":[{"version":"4.0","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","level":"high"}],"updated_at":"2026-11-02T18:02:28.035906Z"}],"ghsa":[{"id":"GHSA-gm75-wg2c-p77x","title":"Calico's Application Layer Policy (disabled by default), which enforces HTTP rules through...","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.","status":"published","published":"2026-07-30T15:31:52Z","modified":"2026-08-08T03:32:15Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:10:12.306859Z"}],"nvd":[{"id":"CVE-2026-6540","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.","status":"published","published":"2026-07-30T15:16:37.533Z","modified":"2026-08-08T01:10:43.697Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-22","CWE-23"],"updated_at":"2026-11-02T14:12:33.955581Z"}],"osv":[{"id":"CVE-2026-6540","title":"L7 policy bypass via unnormalized HTTP path matching","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.","status":"published","published":"2026-07-30T14:45:04.068Z","modified":"2026-10-28T02:30:38.860303842Z","cvss":[{"version":"4.0","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","level":"high"}],"cwes":["CWE-22","CWE-23"],"updated_at":"2026-11-02T15:45:14.096824Z"}]}}