CVE-2026-111811

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{"bugzilla": {"description": "trafficserver: Apache Traffic Server: tsmemcache plugin exposes the shared proxy cache over the network with no authentication", "id": "2558504", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558504"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L", "status": "draft"}, "cwe": "CWE-306", "details": ["Apache Traffic Server's experimental tsmemcache plugin allows unauthenticated network read, write, and deletion of the shared proxy cache.\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 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 the experimental tsmemcache plugin is enabled, it fails to enforce authentication on incoming network connections. An unauthenticated remote attacker can exploit this flaw to inspect, modify, or delete entries in the shared proxy cache, leading to sensitive information disclosure and cache tampering."], "name": "CVE-2026-111811", "public_date": "2026-10-21T19:17:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-111811\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-111811\nhttps://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc"], "statement": "This vulnerability is rated as having Important impact because an unauthenticated remote attacker can inspect, alter, or delete cached proxy data across the network, compromising the confidentiality and integrity of cached web sessions. However, exploitation is contingent upon explicitly configuring and enabling the experimental `tsmemcache` plugin, which is not loaded or active in default configurations. Deployments that do not explicitly enable this experimental plugin in their configuration are not exposed to this vulnerability.", "threat_severity": "Important"}

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