TI-2026-47558 Aliases CVE-2026-67242

RabbitMQ: OAuth2 is_integer(Exp) guard skips token-expiry checks for float exp

HIGH 67CWE-613Published 2026-09-25 · Updated 2026-09-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: Partial Red Hat: 1 fixed, 5 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-613.

Summary

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, OAuth2 isinteger(Exp) guard skips token-expiry checks for float exp. validatetokenexpiry/1 (lines 208-214) and expirytimestamp/1 (138-144) both guard with 'when isinteger(Exp)' and fall through to ok/never for float values. josejwt:verify validates only the signature, not exp. With float exp, no expiry validation occurs anywhere in the If the IdP emits exp as a JSON float (RFC 7519 permits fractional NumericDate), both the login-time expiry check and the mid-connection disconnect timer are silently skipped , an already-expired token is accepted, and connections never time OAuth2 backend enabled IdP emits float exp (uncommon; mainstream IdPs emit integers) Attacker possesses a previously-valid signed. This issue is fixed in versions 4.2.9 and 4.3.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00345 28th percentileScored 2026-11-07

Fix Partial rabbitmq-server (rabbitmq): 4.2.9, 4.3.3Red Hat: 1 advisoryRed Hat: 1 fixed, 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
rabbitmq	rabbitmq-server	4.2.0 to before 4.2.9; 4.3.0 to before 4.3.3	4.2.9, 4.3.3	Patch available	CNA

rabbitmq-server Vendorrabbitmq Affected 4.2.0 to before 4.2.9; 4.3.0 to before 4.3.3 Fixed in 4.2.9, 4.3.3 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:broadcom:rabbitmq_server::::::::	4.2.0 to before 4.2.9; 4.3.0 to before 4.3.3	Vulnerable	Broadcom

cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:* Versions 4.2.0 to before 4.2.9; 4.3.0 to before 4.3.3 Vulnerable ·Broadcom

Remediation

Fix · CNA rabbitmq-server (rabbitmq) Fixed in 4.2.9, 4.3.3

Red Hat 1 advisory

RHSA-2026:67552 Released 2026-09-15 · Red Hat rating Important
Red Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images rabbitmq-server4.3-4.3.6-1.hum1@aarch64, rabbitmq-server4.3-4.3.6-1.hum1@src, rabbitmq-server4.3-4.3.6-1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Hardened Images	Affected	No fix planned: Will not fix
Red Hat OpenStack Platform 13 (Queens)	Affected	No fix planned: Out of support scope
Red Hat OpenStack Platform 16.2	Affected	No fix planned: Out of support scope
Red Hat OpenStack Platform 17.1	Affected	No fix planned: Out of support scope
Red Hat OpenStack Platform 18.0	Affected	No fix yet: Fix deferred
Red Hat Hardened Images	Fixed	RHSA-2026:67552

Timeline

2026-10-02 Threatist record created from CVE-2026-67242
2026-10-16 CVSS score added · NVD

References

Patch 2

Advisory 1

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9

Other 2

TI-2026-41154 Improper authentication in rabbitmq-server CVSS 3.1CRITICAL 10.0
TI-2026-41149 RabbitMQ: UNC SSRF affecting the management UI on Windows CVSS 3.1CRITICAL 10.0
TI-2026-41158 Resource allocation without limits in rabbitmq-server CVSS 3.1HIGH 7.5
TI-2026-47695 RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint CVSS 4.0HIGH 8.2
TI-2026-47694 RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS CVSS 4.0HIGH 8.2
TI-2026-45167 RabbitMQ Java client: Unvalidated Class.forName in JSON-RPC ProcedureDescription enables arbitrary class loading CVSS 4.0HIGH 7.5

See all 100 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences