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{"bugzilla": {"description": "github.com/traefik/traefik: Traefik: Cross-tenant traffic exposure and host restriction bypass via rule-syntax injection in Knative provider", "id": "2452235", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452235"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-917", "details": ["A flaw was found in Traefik, an HTTP reverse proxy and load balancer. When using the Knative provider, Traefik incorrectly interpolates user-controlled values into router rule expressions without proper escaping. This vulnerability allows an attacker to inject malicious rule syntax, leading to a host restriction bypass. In multi-tenant environments, this can result in unauthorized traffic being routed to victim services, potentially exposing cross-tenant traffic."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-32695", "package_state": [{"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Affected", "package_name": "devspaces/traefik-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}], "public_date": "2026-03-27T13:47:03Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32695\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32695\nhttps://github.com/traefik/traefik/releases/tag/v3.6.11\nhttps://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2\nhttps://github.com/traefik/traefik/security/advisories/GHSA-67jx-r9pv-98rj"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.6.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.7.0-ea.1,3.7.0-ea.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "traefik", "source": "cna", "vendor": "traefik"}, "product": "traefik", "vendor": "traefik"}], "analysis": {"en": {"generated_at": "2026-04-03T20:26:22.735822+00:00", "value": {"mitigation_remediation": ["Upgrade Traefik to version 3.6.11 or later, or version 3.7.0-ea.2 or later"], "summary": {"action": "Apply Patch", "impact": "Host Restriction Bypass"}, "threat_synthesis": {"affected_systems": "Traefik v3.6.x earlier than 3.6.11 and v3.7.0-ea.1 or earlier are affected. The vulnerability exists in the Knative provider component of Traefik.", "description_and_impact": "Traefik\u2019s Knative provider interpolates user\u2011controlled values into backtick\u2011delimited rule expressions without escaping, allowing syntax injection in the hosts field. An attacker can supply an entry such as tenant.example.com || Host(`attacker.com`), resulting in a router that serves attacker\u2011controlled hosts. This bypasses host restriction and permits unauthorized traffic to reach victim services, exposing sensitive data across tenants.", "risk_and_exploitability": "The CVSS score of 6.3 classifies the issue as medium severity. An EPSS score below 1% indicates a low likelihood of exploitation in the wild, and the vulnerability is not listed in CISA\u2019s Known Exploited Vulnerabilities catalog. The attack vector is inferred as remote, via HTTP traffic configured through the Knative provider; exploitation requires an attacker to supply a malicious hosts entry in a Knative rule set."}}}}, "created": "2026-03-27T20:28:51.444726+00:00", "updated": "2026-04-03T21:18:01.088302+00:00", "vendors": ["traefik", "traefik$PRODUCT$traefik"]}