CVE-2026-67223

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (26th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

RabbitMQ is a messaging and streaming broker. The advisory establishes affected 3.13, 4.0, 4.1, 4.2, and 4.3 maintenance lines but contains conflicting first-fixed versions for the 3.13, 4.0, and 4.1 lines. fill/2 substitutes ${username} into user_dn_pattern without RFC 4514 DN escaping, allowing a crafted username to alter the LDAP bind DN and potentially select a different directory entry. Exploitation requires rabbitmq_auth_backend_ldap with a user_dn_pattern containing ${username}, a directory layout in which the injected suffix resolves usefully, and a password valid for the resulting DN. The advisory body identifies 3.13.15, 4.0.20, 4.1.11, 4.2.9, and 4.3.3 as fixed, while structured metadata identifies 3.13.18, 4.0.23, 4.1.14, 4.2.9, and 4.3.3. No fixed-version assertion is certifiable until a curator resolves this conflict.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 28, 2026

Advisory Details (5)

Auto-updated Sep 25, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

RabbitMQ 4.3.3

Patch available: rabbitmq/rabbitmq-server v4.3.3

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3
github_release Patch Available

RabbitMQ 4.2.9

Patch available: rabbitmq/rabbitmq-server v4.2.9

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9
github_commit

commit b54056e59b7f (rabbitmq/rabbitmq-server)

Fix landed in rabbitmq/rabbitmq-server commit b54056e59b7f — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/commit/b54056e59b7fd3a2d7f07dfaba95f026e138eee8
github_commit

commit ad3ca47accd3 (rabbitmq/rabbitmq-server)

Fix landed in rabbitmq/rabbitmq-server commit ad3ca47accd3 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/commit/ad3ca47accd313a4a0dbcbbe17bf60fc8f4b2614
github Patch Available

LDAP DN injection via unescaped substitution · Advisory · rabbitmq/rabbitmq-server · GitHub

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-9x7r-g78c-5835

Vendor Advisories for CVE-2026-67223(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
rabbitmq-server3.10.8-1.1 ... 4.3.2-5 (28 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
rabbitmq-server4.0.5-10 ... 4.3.2-5 (18 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
rabbitmq-server4.0.5-10 ... 4.3.2-5 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 04:53 UTCEG score recompute
  2. 2026-10-05 04:53 UTCVendor advisory
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 02:32 UTCEG score recompute
  5. 2026-10-04 02:32 UTCVendor advisory
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 00:11 UTCEG score recompute
  8. 2026-10-03 00:11 UTCVendor advisory
  9. 2026-10-02 17:56 UTCEPSS rescore
  10. 2026-10-01 21:51 UTCEG score recompute
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-09-30 19:26 UTCEG score recompute
  13. 2026-09-30 15:03 UTCEPSS rescore
  14. 2026-09-29 17:05 UTCEG score recompute
  15. 2026-09-28 14:44 UTCEG score recompute
  16. 2026-09-28 13:52 UTCEPSS rescore
  17. 2026-09-27 23:23 UTCEG score recompute
  18. 2026-09-27 13:48 UTCEPSS rescore
  19. 2026-09-26 21:02 UTCEG score recompute
  20. 2026-09-26 15:59 UTCEPSS rescore
  21. 2026-09-25 18:40 UTCEG score recompute
  22. 2026-09-25 17:58 UTCEG score recompute
  23. 2026-09-25 17:37 UTCEG score recompute
  24. 2026-09-25 16:24 UTCEG score recompute
  25. 2026-09-25 16:24 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-67223?
CVE-2026-67223 is a medium vulnerability published on September 25, 2026. RabbitMQ is a messaging and streaming broker. The advisory establishes affected 3.13, 4.0, 4.1, 4.2, and 4.3 maintenance lines but contains conflicting first-fixed versions for the 3.13, 4.0, and 4.1 lines. fill/2 substitutes ${username} into userdnpattern without RFC 4514 DN escaping, allowing a…
When was CVE-2026-67223 disclosed?
CVE-2026-67223 was first published on September 25, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67223 actively exploited?
CVE-2026-67223 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67223?
CVE-2026-67223 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67223?
A fix for CVE-2026-67223 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67223 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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