{"id":"CVE-2026-57220","title":"RabbitMQ is a messaging and streaming broker","summary":"RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an una…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"broadcom","product":"rabbitmq_server","affected":["rabbitmq_server >= 4.2.0, < 4.2.6"],"patched":["rabbitmq_server 4.2.6"],"published":"2026-07-10","updated":"2026-10-09","sourceUpdated":"2026-10-09T10:35:50.540","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-57220","references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/pull/16171","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/pull/16173","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00547,"epssPercentile":0.45669,"ingestedAt":"2026-07-11T20:15:27.333Z","slug":"CVE-2026-57220","body":"## Overview\n\nRabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths and consume broker memory in rabbit_stream_core. This issue is fixed in version 4.2.6.\n\n## Affected\n\n- `rabbitmq_server >= 4.2.0, < 4.2.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `rabbitmq_server 4.2.6`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}