{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6540", "assignerOrgId": "e6d453f4-3dae-4941-bcea-9af25f4e824d", "state": "PUBLISHED", "assignerShortName": "Tigera", "dateReserved": "2026-04-17T17:41:32.750Z", "datePublished": "2026-07-30T14:45:04.068Z", "dateUpdated": "2026-07-30T16:12:07.691Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "e6d453f4-3dae-4941-bcea-9af25f4e824d", "shortName": "Tigera", "dateUpdated": "2026-07-30T14:45:04.068Z"}, "title": "L7 policy bypass via unnormalized HTTP path matching", "datePublic": "2026-07-30T16:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-22", "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-23", "description": "CWE-23 Relative Path Traversal", "type": "CWE"}]}], "affected": [{"vendor": "Tigera", "product": "Calico", "versions": [{"status": "affected", "version": "0", "lessThan": "3.31.6", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Tigera", "product": "Calico Enterprise", "versions": [{"status": "affected", "version": "0", "lessThan": "3.21.7", "versionType": "semver"}, {"status": "affected", "version": "3.22.0", "lessThan": "3.22.4", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Tigera", "product": "Calico Cloud", "versions": [{"status": "affected", "version": "0", "lessThan": "22.4.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "references": [{"url": "https://github.com/projectcalico/calico/pull/12531", "tags": ["patch"]}, {"url": "https://github.com/projectcalico/calico/pull/12532", "tags": ["patch"]}, {"url": "https://github.com/projectcalico/calico/pull/12533", "tags": ["patch"]}, {"url": "https://www.tigera.io/security-bulletins/tta-2026-005/", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.9, "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Behnam Shobiri", "type": "finder"}, {"lang": "en", "value": "Seth Malaki", "type": "remediation developer"}, {"lang": "en", "value": "Anthony Tam", "type": "remediation reviewer"}, {"lang": "en", "value": "Matt Dupre", "type": "remediation reviewer"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-30T16:12:00.537090Z", "id": "CVE-2026-6540", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-30T16:12:07.691Z"}}]}}

{}

{}

{}

{}