CVEvulnerability

CVE-2026-66071

6.0 MEDIUM Published 2026-09-25 Modified 2026-10-15 Official page ↗
Status
Analyzed
Published
2026-09-25
Last modified
2026-10-15
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.0 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400

Description

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15 and 4.0.22 and 4.1.11 and 4.2.6 and 4.3.1, Atom exhaustion: OAuth2 JWT tag: scope values. extractscopes/1 parses scopes of the form .tag: and calls rabbitdatacoercion:toatom() to convert to a tag atom. The token signature is verified first, so the attacker cannot forge scopes , but in IdP configurations where scope content is user-influenced, each login with a novel tag value leaks one In deployments where users can influence the scopes included in their IdP-issued JWT rabbitmqauthbackendoauth2 enabled IdP permits attacker-influenced scope values in signed tokens. This issue is fixed in versions 3.13.15 and 4.0.22 and 4.1.11 and 4.2.6 and 4.3.1.

Affected configurations

• broadcom rabbitmq server (>= 3.13.0 < 3.13.15) • broadcom rabbitmq server (>= 4.0.0 < 4.0.22) • broadcom rabbitmq server (>= 4.1.0 < 4.1.11) • broadcom rabbitmq server (>= 4.2.0 < 4.2.6) • broadcom rabbitmq server (>= 4.3.0 < 4.3.1)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References