DEBIAN-CVE-2026-67409

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Source
https://security-tracker.debian.org/tracker/CVE-2026-67409
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67409.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-67409
Upstream
Published
2026-09-25T17:17:12Z
Modified
2026-09-26T05:00:10Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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 Calculator
Summary
[none]
Details

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18, JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS (CWE-252). the JWKS key fetching mechanism in uaajwt.erl does not validate the HTTP response status code when downloading signing keys from the OAuth2 provider's JWKS endpoint. Non-200 responses (including 4xx and 5xx errors) are processed identically to successful responses. When the JWKS endpoint returns an error response with a valid-JSON body that lacks a keys field, all previously cached signing keys are destroyed, causing a persistent authentication denial of Files: deps/rabbitmqauthbackendoauth2/src/uaajwt.erl, lines 50-63 deps/rabbitmqauthbackendoauth2/src/uaajwks.erl, lines 5-7 deps/rabbitmqauthbackendoauth2/src/rabbitoauth2provider.erl, lines 98-107 Bug 1: HTTP status code ignored (uaajwt.erl:50-63): The Erlang httpc module returns {ok, {{HttpVersion, StatusCode, ReasonPhrase}, Headers, Body}}. The pattern {ok, {, , JwksBody}} matches ANY successful HTTP transaction Persistent authentication DoS: Once keys are destroyed, ALL OAuth2/JWT authentication fails for all users until a new successful JWKS refresh occurs Amplification: A single attacker can deny access to all legitimate OAuth2 users across the entire RabbitMQ. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18.

References

Affected packages

Debian:12 / rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/debian/rabbitmq-server?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.10.8-1.1
3.10.8-1.1+deb12u1
3.10.8-2
3.10.8-3
3.10.8-4
3.12.1-1
3.12.1-1.1
4.*
4.0.5-1
4.0.5-2
4.0.5-3
4.0.5-4
4.0.5-5
4.0.5-6
4.0.5-8
4.0.5-9
4.0.5-10
4.0.5-11
4.0.5-12
4.0.5-13
4.0.5-14
4.3.0-1
4.3.0-2
4.3.0-3
4.3.2-1
4.3.2-2
4.3.2-3
4.3.2-4
4.3.2-5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67409.json"

Debian:13 / rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/debian/rabbitmq-server?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.0.5-6
4.0.5-6+deb13u1
4.0.5-6+deb13u2
4.0.5-8
4.0.5-9
4.0.5-10
4.0.5-11
4.0.5-12
4.0.5-13
4.0.5-14
4.3.0-1
4.3.0-2
4.3.0-3
4.3.2-1
4.3.2-2
4.3.2-3
4.3.2-4
4.3.2-5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67409.json"

Debian:14 / rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/debian/rabbitmq-server?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.0.5-6
4.0.5-8
4.0.5-9
4.0.5-10
4.0.5-11
4.0.5-12
4.0.5-13
4.0.5-14
4.3.0-1
4.3.0-2
4.3.0-3
4.3.2-1
4.3.2-2
4.3.2-3
4.3.2-4
4.3.2-5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67409.json"