CVE-2026-25949

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.6.8)"}}], "product": "traefik", "vendor": "traefik"}], "analysis": {"en": {"generated_at": "2026-04-17T19:59:35.103197+00:00", "value": {"mitigation_remediation": ["Upgrade Traefik to version 3.6.8 or later. ", "If upgrading is not immediately possible, block or restrict access to the TCP entrypoint for PostgreSQL clients, for example by firewall rules or by controlling ingress traffic. ", "Deploy additional connection\u2011limit or idle\u2011timeout controls on downstream services to mitigate the impact if a stale connection persists."], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Traefik instances running any version prior to 3.6.8 on any supported platform are vulnerable. The issue resides in the handling of STARTTLS requests in the TCP proxy layer.", "description_and_impact": "An attacker who can establish an unauthenticated TCP connection to a Traefik entrypoint may send a PostgreSQL STARTTLS prelude and then stop responding. Traefik\u2019s readTimeout configured on that entrypoint is bypassed, so the connection stays open indefinitely, consuming server resources until the system is overwhelmed or services become unavailable.", "risk_and_exploitability": "The CVSS score of 7.5 indicates a high denial\u2011of\u2011service risk. The EPSS score is under 1%, suggesting exploitation is unlikely at present, and the vulnerability is not listed in CISA\u2019s KEV catalog. An attacker only needs network access to the affected TCP port and can exploit the flaw with a simple STARTTLS packet, without authentication or privileged credentials. The weakness involves uncontrolled resource consumption (CWE\u2011400) and potential memory allocation over\u2011commitment (CWE\u2011770)."}}}}, "created": "2026-02-13T21:29:27.479636+00:00", "updated": "2026-04-17T20:00:09.043066+00:00", "vendors": ["traefik", "traefik$PRODUCT$traefik"]}