CVE-2026-67223 (GCVE-0-2026-67223)

Vulnerability from cvelistv5 – Published: 2026-09-25 16:15 – Updated: 2026-09-25 17:51
VLAI
Title
RabbitMQ: LDAP DN injection via unescaped substitution
Summary
RabbitMQ is a messaging and streaming broker. The advisory establishes affected 3.13, 4.0, 4.1, 4.2, and 4.3 maintenance lines but contains conflicting first-fixed versions for the 3.13, 4.0, and 4.1 lines. fill/2 substitutes ${username} into user_dn_pattern without RFC 4514 DN escaping, allowing a crafted username to alter the LDAP bind DN and potentially select a different directory entry. Exploitation requires rabbitmq_auth_backend_ldap with a user_dn_pattern containing ${username}, a directory layout in which the injected suffix resolves usefully, and a password valid for the resulting DN. The advisory body identifies 3.13.15, 4.0.20, 4.1.11, 4.2.9, and 4.3.3 as fixed, while structured metadata identifies 3.13.18, 4.0.23, 4.1.14, 4.2.9, and 4.3.3. No fixed-version assertion is certifiable until a curator resolves this conflict.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 17:50 UTC
CWE
  • CWE-90 - Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
Assigner
References
Impacted products
Vendor Product Version
rabbitmq rabbitmq-server Affected: >= 3.13.0, < 3.13.18
Affected: >= 4.0.0, < 4.0.23
Affected: >= 4.1.0, < 4.1.14
Affected: >= 4.2.0, < 4.2.9
Affected: >= 4.3.0, < 4.3.3
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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