CVE-2026-67410Public exploitNetwork attack vectorHinoki check available

OAuth2 secret disclosure via unauthenticated JavaScript endpoint

Published Sep 25, 2026 · Updated Sep 25, 2026

Information disclosure in RabbitMQ Server 4.2.0 through 4.2.8 and 4.3.0 through 4.3.2 allows remote attackers to read an OAuth2 client secret. The bootstrap handler omits authorization and serializes oauth_client_secret into JavaScript returned by /js/oidc-oauth/bootstrap.js. Exposure requires the management plugin, OAuth2 for the UI, a configured client secret, and network access to the management port.

CVSS severity8.2
High
EPSS probability0.35%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in RabbitMQ Server 4.2.0 through 4.2.8 and 4.3.0 through 4.3.2 allows remote attackers to read an OAuth2 client secret. The bootstrap handler omits authorization and serializes oauth_client_secret into JavaScript returned by /js/oidc-oauth/bootstrap.js. Exposure requires the management plugin, OAuth2 for the UI, a configured client secret, and network access to the management port.

The record

CVE
CVE-2026-67410
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
RabbitMQ
Product
RabbitMQ Server
Classifications
CWE-200, T1552
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, < 4.2.9
  2. Affected versionversion=>= 4.3.0, < 4.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RabbitMQ · RabbitMQ Serverversion=>= 4.2.0, < 4.2.9; version=>= 4.3.0, < 4.3.3

Published CVSS scores

8.2GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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 exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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