CVE-2026-66074

mediumpriority · track · 26EPSS 0.004 · 32 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.39% (32nd) EPSS

CVSS 6.5 · medium

Is it mine?

19 products

Check your exposure

Who says so?

3 sources

osv · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.3–6.5

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v4.06mediumCVSS: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:Xsecondary · security-advisories@github.com

v4.02.3lowCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1333US

affected products (19)

Products and version ranges known to be affected.

Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Open Source Open Source RabbitMQ <3.13.15< 3.13.15cert_bundDE
Open Source Open Source RabbitMQ <4.0.22< 4.0.22cert_bundDE
Open Source Open Source RabbitMQ <4.1.11< 4.1.11cert_bundDE
Open Source Open Source RabbitMQ <4.2.8< 4.2.8cert_bundDE
Open Source Open Source RabbitMQ <4.3.2< 4.3.2cert_bundDE
Open Source RabbitMQ< 3.13.15cert_bundDE
Open Source RabbitMQ< 4.0.22cert_bundDE
Open Source RabbitMQ< 4.1.11cert_bundDE
Open Source RabbitMQ< 4.2.8cert_bundDE
Open Source RabbitMQ< 4.3.2cert_bundDE
broadcom rabbitmq server3.13.0 → 3.13.15nvdUScpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*
broadcom rabbitmq server4.0.0 → 4.0.20nvdUScpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*
broadcom rabbitmq server4.1.0 → 4.1.11nvdUScpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*
broadcom rabbitmq server4.2.0 → 4.2.6nvdUScpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*
Bitnami rabbitmq3.13.0 → 3.13.15osvUSpkg:bitnami/rabbitmq
Bitnami rabbitmq4.0.0 → 4.0.20osvUSpkg:bitnami/rabbitmq
Bitnami rabbitmq4.1.0 → 4.1.11osvUSpkg:bitnami/rabbitmq
Bitnami rabbitmq4.2.0 → 4.2.6osvUSpkg:bitnami/rabbitmq

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2268RabbitMQ: Mehrere SchwachstellenDeutsch2026-07-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in RabbitMQ ausnutzen, um beliebigen Programmcode auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.
BIT-rabbitmq-2026-66074RabbitMQ: ReDoS via management API ?name= filter2026-10-01vendor · osvUS
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.

also known as (1)

Other names and identifiers for this entity.

GHSA-rg5q-vcgf-rfh7 osv

sources

Which sources assert this record, and when.

osv cert_bund nvd NVD CVE.org MITRE

published 2026-09-23modified 2026-10-19

references (3) nvd

External citations — patches, advisories, analysis.

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6Release Notes
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0Release Notes
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rg5q-vcgf-rfh7Vendor Advisory

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