CVE-2026-111810

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{"bugzilla": {"description": "trafficserver: trafficserver: Denial of Service via unthrottled logging of stripped headers", "id": "2558493", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558493"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["Apache Traffic Server 9.2.15, 10.1.4 and 10.2.0 write one unthrottled diagnostic log line for every internal @ header they strip, so a request carrying many such headers makes the proxy write far more log data than the request contains.\nThis issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0.\nUsers are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.", "A flaw was found in Apache Traffic Server. When processing incoming requests, the server writes an unthrottled diagnostic log entry for each internal header that it strips. A remote attacker can exploit this issue by sending HTTP requests with an unusually high number of internal headers, causing excessive log data generation that may exhaust disk space and result in a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "rate-limit or cap diagnostic logging of stripped headers; restrict log verbosity; monitor disk usage"}, "name": "CVE-2026-111810", "public_date": "2026-10-21T19:14:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-111810\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-111810\nhttps://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc"], "statement": "unthrottled per-header diagnostic logging in Apache Traffic Server 9.2.15/10.1.4/10.2.0 allows a remote unauthenticated attacker to exhaust disk space via requests containing many internal @ headers; fixed in 9.2.16/10.1.5/10.2.1", "threat_severity": "Important"}

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