CVE-2026-67237Network attack vectorHinoki check available

Pre-auth JavaScript execution via unescaped bearer token

Published Sep 25, 2026 · Updated Sep 25, 2026

Reflected XSS in RabbitMQ Server 4.2.0 through 4.2.7 and 4.3.0 through 4.3.1 allows remote attackers to run JavaScript via bootstrap requests. The set_token_auth/2 function concatenates a bearer token from the Authorization header or access_token cookie into a single-quoted JavaScript call without escaping or validation. Pre-authentication exposure requires management.oauth_enabled; the cookie path also requires planting the cookie, and execution in an administrator's browser grants access to the management HTTP API.

CVSS severity7.5
High
EPSS probability0.48%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected XSS in RabbitMQ Server 4.2.0 through 4.2.7 and 4.3.0 through 4.3.1 allows remote attackers to run JavaScript via bootstrap requests. The set_token_auth/2 function concatenates a bearer token from the Authorization header or access_token cookie into a single-quoted JavaScript call without escaping or validation. Pre-authentication exposure requires management.oauth_enabled; the cookie path also requires planting the cookie, and execution in an administrator's browser grants access to the management HTTP API.

The record

CVE
CVE-2026-67237
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
RabbitMQ
Product
RabbitMQ Server
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.2.0, < 4.2.8
  2. Affected versionversion=>= 4.3.0, < 4.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RabbitMQ · RabbitMQ Serverversion=>= 4.2.0, < 4.2.8; version=>= 4.3.0, < 4.3.2

Published CVSS scores

7.5GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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