{"id":"CVE-2026-59675","published":"2026-08-05T08:16:34.593","lastModified":"2026-08-05T14:17:08.367","description":"When API audit logging is enabled, the middleware reads the entire HTTP request body into memory without enforcing a size limit on login endpoints. Because the audit middleware is positioned earlier in the handler chain than Rancher's APIBodyLimitingHandler, the body-size cap (default 1 MiB) is bypassed for requests that pass through the audit copyReqBody path. An unauthenticated attacker can send arbitrarily large request bodies to the public login endpoints, causing the Rancher Manager server process to allocate memory proportional to the supplied body size. With just a few concurrent connections, this can exhaust available memory and terminate the Rancher Manager plane process, making the Rancher API and UI unavailable and interrupting management of all downstream clusters.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-770"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-59675","tags":[]},{"url":"https://github.com/rancher/rancher/security/advisories/GHSA-g4f6-44g4-23xm","tags":[]}],"exploitRefs":[{"url":"https://github.com/rancher/rancher/security/advisories/GHSA-g4f6-44g4-23xm","tags":[]}],"hasPoc":true,"ai":{"summary":"This flaw allows unauthenticated attackers to send large HTTP requests that can exhaust memory on the Rancher Manager server, leading to service disruption.","exploitability":"Exploitation is relatively easy as it requires sending large payloads to public login endpoints without any authentication preconditions.","blast_radius":"If exploited, this can render the entire Rancher API and UI unavailable, impacting management of all downstream clusters.","remediation":"Implement a size limit on HTTP request bodies for login endpoints or disable API audit logging that bypasses the body-size cap.","tags":["memory-exhaustion","api-security","unauthenticated","service-disruption"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:58:21.933Z"}}