CVE-2026-66078Medium· 5.5▾ TwilightPoC availableRabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6, protected tag bypass via bulk-delete. dELETE /api/users/:name refuses to delete users tagged protected (rabbitmgmtwmuser:deleteresou…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 30.3 · 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
0.4%
Exploit / PoC code exists
Last analysed / modified upstream
0.4% → 0.4%
2.1 → 5.5
low → medium
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6, protected tag bypass via bulk-delete. dELETE /api/users/:name refuses to delete users tagged protected (rabbitmgmtwmuser:deleteresource/2 checks isprotecteduser). POST /api/users/bulk-delete iterates the supplied username list and calls rabbitauthbackendinternal:deleteuser/2 directly , that function has no protected-tag check , so the guard is silently An administrator can delete protected-tagged service accounts via the bulk endpoint, bypassing a safeguard the test suite confirms is rabbitmqmanagement enabled Attacker has the administrator tag A protected-tagged user. This issue is fixed in versions 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6.
rabbitmq_server >= 3.13.0, < 3.13.15rabbitmq_server >= 4.0.0, < 4.0.20rabbitmq_server >= 4.1.0, < 4.1.11rabbitmq_server >= 4.2.0, < 4.2.6Upgrade past the affected range:
rabbitmq_server 4.2.6Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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