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CVE-2026-66074

RabbitMQ: ReDoS via management API ?name= filter

6.0 MediumFix available

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.39%Up 0.1 points since Sep 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.0

RabbitMQ: ReDoS via management API ?name= filter

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
CVE-2026-66074
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-1333
Updated
2026-11-02
EUVDEUVD-2026-85660 6.0

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
EUVD-2026-85660
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
NVD 6.0

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
CVE-2026-66074
CVSS 4.0
6.0 MediumCVSS: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
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
OSV 6.0

RabbitMQ: ReDoS via management API ?name= filter

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
CVE-2026-66074
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-1333
Updated
2026-11-02
OSVDEBIAN-CVE-2026-66074 6.5

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
DEBIAN-CVE-2026-66074
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2026:67552 8.7

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:67552
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-66074 6.0

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
UBUNTU-CVE-2026-66074
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-105783 No score

CVE-2026-66074 affecting package rabbitmq-server for versions less than 3.13.7-10

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
AZL-105783
Updated
2026-11-05
OSVBIT-rabbitmq-2026-66074 No score

RabbitMQ: ReDoS via management API ?name= filter

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

Record
BIT-rabbitmq-2026-66074
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rabbitmq-server
Azure Linux:3
 before 3.13.7-10
3.13.7-10
rabbitmq
Bitnami
 3.13.0 up to 3.13.15, 4.0.0 up to 4.0.20, 4.1.0 up to 4.1.11, 4.2.0 up to 4.2.6
3.13.154.0.204.1.114.2.6
rabbitmq-server
Debian:12
 All versions, plus listed versions
3.10.8-1.13.10.8-1.1+deb12u13.10.8-23.10.8-33.10.8-4
Show 24 moreShow less
3.12.1-13.12.1-1.14.0.5-14.0.5-104.0.5-114.0.5-124.0.5-134.0.5-144.0.5-24.0.5-34.0.5-44.0.5-54.0.5-64.0.5-84.0.5-94.3.0-14.3.0-24.3.0-34.3.2-14.3.2-24.3.2-34.3.2-44.3.2-54.3.6-1
 None known
rabbitmq-server
Debian:13
 All versions, plus listed versions
4.0.5-104.0.5-114.0.5-124.0.5-134.0.5-14
Show 14 moreShow less
4.0.5-64.0.5-6+deb13u14.0.5-6+deb13u24.0.5-84.0.5-94.3.0-14.3.0-24.3.0-34.3.2-14.3.2-24.3.2-34.3.2-44.3.2-54.3.6-1
 None known
rabbitmq-server
Debian:14
 before 4.3.0-2, plus listed versions
4.0.5-104.0.5-114.0.5-124.0.5-134.0.5-14
Show 4 moreShow less
4.0.5-64.0.5-84.0.5-94.3.0-1
4.3.0-2
rabbitmq-server4.3
Red Hat:hummingbird:1
From an advisory covering 54 CVEs
 before 0:4.3.6-1.hum1
0:4.3.6-1.hum1
rabbitmq-server
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
3.5.4-13.5.4-33.5.4-3.13.5.7-13.5.7-1ubuntu0.16.04.1
Show 5 moreShow less
3.5.7-1ubuntu0.16.04.23.5.7-1ubuntu0.16.04.43.5.7-1ubuntu0.16.04.4+esm13.5.7-1ubuntu0.16.04.4+esm23.5.7-1ubuntu0.16.04.4+esm3
 None known
rabbitmq-server
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
3.6.10-13.6.10-1ubuntu0.13.6.10-1ubuntu0.33.6.10-1ubuntu0.43.6.10-1ubuntu0.53.6.10-1ubuntu0.5+esm1
 None known
rabbitmq-server
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
3.7.8-4ubuntu23.7.18-13.8.2-0ubuntu13.8.2-0ubuntu1.13.8.2-0ubuntu1.2
Show 8 moreShow less
3.8.2-0ubuntu1.33.8.2-0ubuntu1.43.8.2-0ubuntu1.53.8.3-0ubuntu0.13.8.3-0ubuntu0.23.8.3-0ubuntu0.33.8.3-0ubuntu0.3+esm13.8.3-0ubuntu0.3+esm2
 None known
rabbitmq-server
Ubuntu:22.04:LTS
 All versions, plus listed versions
3.8.9-3ubuntu13.9.8-13.9.8-23.9.8-33.9.8-5
Show 8 moreShow less
3.9.8-63.9.13-13.9.13-1ubuntu0.22.04.13.9.13-1ubuntu0.22.04.23.9.27-0ubuntu0.13.9.27-0ubuntu0.23.9.27-0ubuntu0.53.9.27-0ubuntu0.6
 None known
rabbitmq-server
Ubuntu:24.04:LTS
 All versions, plus listed versions
3.12.1-13.12.1-1ubuntu13.12.1-1ubuntu1.23.12.1-1ubuntu1.43.12.1-1ubuntu1.63.12.1-1ubuntu1.7
 None known
rabbitmq-server
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.0.5-8ubuntu24.0.5-10ubuntu14.0.5-10ubuntu24.0.5-10ubuntu34.0.5-10ubuntu44.0.5-10ubuntu54.0.5-10ubuntu5.14.0.5-10ubuntu5.2
 None known

History

History
RecordedChangedSources
affected
factsOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-66074 is a medium vulnerability (CVSS 6.0) in Broadcom Rabbitmq Server, published September 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 32nd percentile. Fixed in rabbitmq-server 3.13.7-10.

References

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