CVE-2026-67421Medium· 6.8▾ TwilightPoC availableRabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, RabbitMQ Management rendered an AMQP authorization-error reason containing an attacker-controlled queue name as HTML when the OAu…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 37.4 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 27.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Exploit / PoC code exists
0.3%
Last analysed / modified upstream
4.5 → 6.8
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, RabbitMQ Management rendered an AMQP authorization-error reason containing an attacker-controlled queue name as HTML when the OAuth management UI was enabled. Exploitation requires an attacker with queue configure permission, a management administrator who can see but cannot read that queue, and the administrator clicking Get Message(s). A queue name containing a base element can then retarget the automatic relative refresh because the Content Security Policy omits base-uri and connect-src, and an attacker endpoint that permits the management origin through CORS can receive the victim's Authorization header. This issue is fixed in versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.
rabbitmq_server >= 3.13.0, < 3.13.9rabbitmq_server >= 4.0.0, < 4.0.24rabbitmq_server >= 4.1.0, < 4.1.15rabbitmq_server >= 4.2.0, < 4.2.10rabbitmq_server >= 4.3.0, < 4.3.5Upgrade past the affected range:
rabbitmq_server 4.3.5Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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