CVE-2026-111804

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{"bugzilla": {"description": "trafficserver: trafficserver: Denial of Service via use-after-free in WASM plugin", "id": "2558477", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558477"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["Apache Traffic Server's experimental wasm plugin has a use-after-free in its transaction-close handler and forwards unvalidated guest-supplied metric IDs to the internal stats API.\nThis issue affects Apache Traffic Server: from 10.0.0 through 10.1.4, 10.2.0.\nUsers are recommended to upgrade to version 10.1.5 or 10.2.1, which fix the issue.", "A flaw was found in Apache Traffic Server's experimental WebAssembly (WASM) plugin. A remote attacker can trigger a use-after-free condition during transaction closure or supply unvalidated metric identifiers to the internal statistics interface. This flaw allows an attacker to cause an application crash, resulting in a Denial of Service (DoS), or potentially corrupt internal application metrics."], "mitigation": {"lang": "en:us", "value": "Do not enable the experimental WASM plugin on affected instances; upgrade to Apache Traffic Server 10.1.5 or 10.2.1 (or a later fixed release) when available in your stream."}, "name": "CVE-2026-111804", "public_date": "2026-10-21T18:21:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-111804\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-111804\nhttps://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc"], "statement": "Apache Traffic Server 10.0.0\u201310.1.4 and 10.2.0 contain a use-after-free in the experimental WASM plugin's transaction-close handler, which also forwards unvalidated guest-supplied metric IDs to the internal stats API. A remote attacker able to send traffic processed by an instance with the experimental wasm plugin loaded can cause denial of service and metric-stat corruption. Red Hat does not ship Apache Traffic Server in any Red Hat-branded product; only Fedora and EPEL community builds exist. Fixed upstream in 10.1.5 and 10.2.1.", "threat_severity": "Important"}

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