CVE-2026-48020

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{"bugzilla": {"description": "github.com/traefik/traefik: Traefik: Authentication bypass in StripPrefix middleware allows unauthorized access to protected paths", "id": "2491915", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491915"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-22", "details": ["A flaw was found in Traefik, an HTTP reverse proxy and load balancer. This vulnerability exists in the StripPrefix middleware, allowing an unauthenticated attacker to bypass route-level authentication and authorization. By crafting a request path containing '..' or its percent-encoded form, an attacker can access protected backend paths, such as administrative or internal configuration endpoints, without proper authentication. This could lead to unauthorized information disclosure or modification of sensitive settings."], "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-2026-48020", "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": "2026-06-23T19:10:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-48020\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-48020\nhttps://github.com/traefik/traefik/releases/tag/v2.11.48\nhttps://github.com/traefik/traefik/releases/tag/v3.6.19\nhttps://github.com/traefik/traefik/releases/tag/v3.7.3\nhttps://github.com/traefik/traefik/security/advisories/GHSA-xf64-8mw2-4gr2"], "statement": "This is an Important authentication bypass flaw in Traefik's StripPrefix middleware, affecting Red Hat OpenShift Dev Spaces. An unauthenticated remote attacker can exploit this by crafting a specific request path, gaining access to protected backend resources like administrative or internal configuration endpoints. This could lead to unauthorized information disclosure or modification of sensitive settings.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.7.0-ea.1,3.7.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0-beta1,3.6.19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.11.48)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "traefik", "source": "cna", "vendor": "traefik"}, "product": "traefik", "vendor": "traefik"}], "created": "2026-06-23T21:15:07.551616+00:00", "updated": "2026-06-26T01:30:17.134970+00:00", "vendors": ["traefik", "traefik$PRODUCT$traefik"]}