Description
RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths and consume broker memory in rabbit_stream_core. This issue is fixed in version 4.2.6.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rabbitmq | rabbitmq-server | >= 4.2.0, < 4.2.6 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | rabbitmq-server | No fix yet | — |
| Ubuntu 26.04 LTS | rabbitmq-server | No fix yet | — |
| Ubuntu 24.04 LTS | rabbitmq-server | No fix yet | — |
| Ubuntu 22.04 LTS | rabbitmq-server | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | rabbitmq-server | No fix yet | — |
| Ubuntu Pro 18.04 LTS | rabbitmq-server | No fix yet | — |
| Ubuntu Pro 16.04 LTS | rabbitmq-server | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | rabbitmq-server4.2 | 4.2.8-1.hum1 | RHSA-2026:35940 |
| Red Hat Hardened Images 1 | rabbitmq-server4.3 | 4.3.2-1.hum1 | RHSA-2026:35939 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | rabbitmq-server | 4.1.5-160000.2.1 | SUSE-SU-2026:23869-1, SUSE-SU-2026:23859-1 |
| SLES 16.0 | rabbitmq-server | 4.1.5-160000.2.1 | SUSE-SU-2026:23869-1, SUSE-SU-2026:23859-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | rabbitmq-server | 4.1.5-160000.2.1 | openSUSE-SU-2026:21903-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | rabbitmq-server | 3.13.7-8 | — |
Advisories 8
- WID-SEC-2026-2079 RabbitMQ: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 29, 2026
- SUSE-SU-2026:23869-1 Security update for rabbitmq-server SUSE / openSUSE Security Updates · Sep 27, 2026
- SUSE-SU-2026:23859-1 Security update for rabbitmq-server SUSE / openSUSE Security Updates · Sep 27, 2026
- openSUSE-SU-2026:21903-1 Security update for rabbitmq-server SUSE / openSUSE Security Updates · Sep 25, 2026
- WID-SEC-2026-3403 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 24, 2026
- NCSC-2026-0375 Kwetsbaarheden verholpen in Oracle Communications NCSC-NL (Netherlands) · Sep 16, 2026
- RHSA-2026:35940 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Sep 8, 2026
- RHSA-2026:35939 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Sep 8, 2026
References
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q
- https://github.com/rabbitmq/rabbitmq-server/pull/16171
- https://github.com/rabbitmq/rabbitmq-server/pull/16173
- https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547
- https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6