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Public proof of conceptFix available

CVE-2026-67413

A public proof of concept exists; no exploitation attested.

  • Published2026-09-25
  • Fixed in4.3.3 · 4.2.9 · 4.1.14 · 4.0.23
  • WeaknessCWE-1333

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors. This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.

Timeline

dates in UTC
  1. 2026-09-2517:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-67413?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-67413?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Broadcom rabbitmq server
BranchAffectedFixed in
4.3≥ 4.3.0, < 4.3.34.3.3
4.2≥ 4.2.0, < 4.2.94.2.9
4.1≥ 4.1.0, < 4.1.144.1.14
4.0≥ 4.0.0, < 4.0.234.0.23

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-67413 Red Hat Product Security3 products fixed · 8 known affected

    rabbitmq-server: rabbitmq-server: Denial of Service via unbounded regular expression evaluation in JMS topic exchange

    rabbitmq-server4.2.src as a component of Red Hat Hardened Images · rabbitmq-server as a component of Red Hat OpenStack Platform 13 (Queens) · rabbitmq-server.src as a component of Red Hat OpenStack Platform 13 (Queens) · +5 more

  • RHSA-2026:67552 Red Hat Product Security3 products fixed

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

Full record on NVD

Fix

  1. Update Broadcom rabbitmq server to 4.3.3 · 4.2.9 · 4.1.14 · 4.0.23
  2. Vendor fix Red Hat Product Security CVE-2026-67413 · 3 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  3. No fix available, says the vendor Red Hat Product Security CVE-2026-67413 · 1 productFix deferred
  4. No fix planned, says the vendor Red Hat Product Security CVE-2026-67413 · 6 productsOut of support scope
  5. No fix planned, says the vendor Red Hat Product Security CVE-2026-67413 · 1 productWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionpoc2026-09-29
  • OpenCVESSVC decisionpoc—
  • CNACVSS 4.06read 2026-10-23
  • NVDCVSS 3.16.5read 2026-10-23
  • CNAweakness (CWE)CWE-1333read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0 vector
CVSS: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
Published
2026-09-25
Last Modified
2026-10-16
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-67413?

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors. This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.

Is CVE-2026-67413 actively exploited?

A proof-of-concept exploit exists for CVE-2026-67413, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-67413?

CVE-2026-67413 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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