CVE-2026-67238
published 2026-09-23CVE-2026-67238: RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, rabbit_pid_codec:decompose_from_binary/1 parses a caller-supplied ETF-encoded…
PriorityP341high7.1CVSS 4.0
AVNACLATNPRLUINVCNVINVAHSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.33%
24.9th percentile
RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, rabbit_pid_codec:decompose_from_binary/1 parses a caller-supplied ETF-encoded binary and calls binary_to_atom(Node, utf8) on the node-name field. It is reached from rabbit_volatile_queue:pid_from_name/2, which is invoked for any queue name / routing key beginning amq.rabbitmq.reply-to.. The CandidateNodes membership check happens after the atom is created, and the surrounding try/catch cannot reclaim atoms (they are never GC'd). binary_to_existing_atom is not used. Any authenticated AMQP client can crash the entire Erlang VM (all vhosts, all connections) with ~1M cheap requests. Preconditions include Authenticated AMQP 0-9-1 connection to any vhost No per-connection rate limit low enough to make ~1M operations infeasible. This issue is fixed in versions 4.2.7 and 4.3.1.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| ubuntu | rabbitmq-server | — | — |
CVSS provenance
nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/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_ubuntu7.6HIGH
vendor_redhat7.1HIGH
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VulDB
RabbitMQ up to 4.2.6/4.3.0 Pid Codec rabbit_pid_codec:decompose_from_binary node-name heap-based overflow
vuldb·2026-09-23·CVSS 7.1
CVE-2026-67238 [HIGH] RabbitMQ up to 4.2.6/4.3.0 Pid Codec rabbit_pid_codec:decompose_from_binary node-name heap-based overflow
A vulnerability, which was classified as problematic, was found in RabbitMQ up to 4.2.6/4.3.0. This affects the function rabbit_pid_codec:decompose_from_binary of the component Pid Codec. Such manipulation of the argument node-name leads to heap-based buffer overflow.
This vulnerability is listed as CVE-2026-67238. The attack may be performed from remote. There is no available exploit.
You should upgrade the affected component.
Ubuntu
RabbitMQ Server vulnerabilities
vendor_ubuntu·2026-10-15·CVSS 7.6
CVE-2026-67404 [HIGH] RabbitMQ Server vulnerabilities
Title: RabbitMQ Server vulnerabilities
Summary: Several security issues were fixed in RabbitMQ Server.
It was discovered that RabbitMQ Server incorrectly handled CORS wildcard
origin configuration. An attacker could possibly use this issue to cause
a cross-site request forgery attack. This issue only affected Ubuntu 18.04
LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04
LTS. (CVE-2026-66070)
It was discovered that RabbitMQ Server incorrectly handled TLS
peer-certificate DNs in the management UI. An attacker could possibly use
this issue to cause a cross-site scripting attack. (CVE-2026-66077)
It was discovered that RabbitMQ Server incorrectly handled AMQP 1.0 arrays
with zero-width element constructors. An attacker could possibly use this
issue to cause a den
Red Hat
rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding
vendor_redhat·2026-09-23·CVSS 7.1
CVE-2026-67238 [HIGH] CWE-770 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding
rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding
RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, rabbit_pid_codec:decompose_from_binary/1 parses a caller-supplied ETF-encoded binary and calls binary_to_atom(Node, utf8) on the node-name field. It is reached from rabbit_volatile_queue:pid_from_name/2, which is invoked for any queue name / routing key beginning amq.rabbitmq.reply-to.. The CandidateNodes membership check happens after the atom is created, and the surrounding try/catch cannot reclaim atoms (they are never GC'd). binary_to_existing_atom is not used. Any authenticated AMQP client can crash the entire Erlang VM (all vhosts, all connections) with ~1M cheap requests. Preconditions include Aut
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-67238 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding [fedora-all]
bugzilla·2026-09-24·CVSS 7.1
CVE-2026-67238 [HIGH] CVE-2026-67238 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding [fedora-all]
CVE-2026-67238 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding [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 4.2.7 and 4.3.1, rabbit_pid_codec:decompose_from_binary/1 parses a caller-supplied ETF-encoded binary and calls binary_to_atom(Node, utf8) on the node-name field. It is reached from rabbit_volatile_queue:pid_from_name/2, which is invoked for any queue name / routing key beginning amq.rabbitmq.reply-to.. The CandidateNodes membership check happens after the atom is created,
Bugzilla
CVE-2026-67238 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding
bugzilla·2026-09-23·CVSS 7.1
CVE-2026-67238 [HIGH] CVE-2026-67238 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding
CVE-2026-67238 rabbitmq-server: RabbitMQ: Denial of Service due to atom-table exhaustion via reply-to queue name decoding
RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, rabbit_pid_codec:decompose_from_binary/1 parses a caller-supplied ETF-encoded binary and calls binary_to_atom(Node, utf8) on the node-name field. It is reached from rabbit_volatile_queue:pid_from_name/2, which is invoked for any queue name / routing key beginning amq.rabbitmq.reply-to.. The CandidateNodes membership check happens after the atom is created, and the surrounding try/catch cannot reclaim atoms (they are never GC'd). binary_to_existing_atom is not used. Any authenticated AMQP client can crash the entire Erlang VM (all vhosts, all connections) with ~1M cheap requests. Preconditi
2026-09-23
Published