CVE-2026-66072
published 2026-09-23CVE-2026-66072: RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw…
PriorityP338medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
0.38%
31.3th percentile
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied > property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| broadcom | rabbitmq_server | >= 3.13.0 < 3.13.15 | 3.13.15 |
| broadcom | rabbitmq_server | >= 4.0.0 < 4.0.20 | 4.0.20 |
| broadcom | rabbitmq_server | >= 4.1.0 < 4.1.11 | 4.1.11 |
| broadcom | rabbitmq_server | >= 4.2.0 < 4.2.6 | 4.2.6 |
| broadcom | rabbitmq_server | >= 4.3.0 < 4.3.1 | 4.3.1 |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv4.06.0MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:L/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
vendor_redhat6.0MEDIUM
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Red Hat
rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector
vendor_redhat·2026-09-23·CVSS 6.0
CVE-2026-66072 [MEDIUM] CWE-770 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector
rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector
A flaw was found in RabbitMQ. An authenticated stream client with read access to any stream can exploit a vulnerability in the `get_chunk_selector/1` function. This function processes a client-supplied `chunk_selector` property without proper validation, leading to an atom table exhaustion. Successful exploitation can cause the RabbitMQ broker node to crash, resulting in a Denial of Service (DoS).
Package: rabbitmq-server4.2 (Red Hat Hardened Images) - Will not fix
Package: rabbitmq-server4.3 (Red Hat Hardened Images) - Affected
Package: rabbitmq-server (Red Hat OpenStack Platform 13 (Queens)) - Out of support scope
Package: rabbitmq-server (Red Hat OpenStack Platform 16.2) - Out of support
VulDB
RabbitMQ up to 4.3.0 Stream Plugin get_chunk_selector/1 input validation
vuldb·2026-09-23·CVSS 6.0
CVE-2026-66072 [MEDIUM] RabbitMQ up to 4.3.0 Stream Plugin get_chunk_selector/1 input validation
A vulnerability, which was classified as problematic, has been found in RabbitMQ up to 3.13.14/4.0.19/4.1.10/4.2.5/4.3.0. Affected is the function get_chunk_selector/1 of the component Stream Plugin. Performing a manipulation results in improper input validation.
This vulnerability is identified as CVE-2026-66072. The attack can be initiated remotely. There is not any exploit available.
It is advisable to upgrade the affected component.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-66072 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector [fedora-all]
bugzilla·2026-09-24·CVSS 6.0
CVE-2026-66072 [MEDIUM] CVE-2026-66072 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector [fedora-all]
CVE-2026-66072 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied > property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-pr
Bugzilla
CVE-2026-66072 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector
bugzilla·2026-09-23·CVSS 6.0
CVE-2026-66072 [MEDIUM] CVE-2026-66072 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector
CVE-2026-66072 rabbitmq-server: RabbitMQ: Denial of Service via atom table exhaustion in stream chunk_selector
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied > property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.
2026-09-23
Published