CVE-2026-67218

MEDIUMNVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (31st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-85663 (ENISA EUVD)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

RabbitMQ is a messaging and streaming broker. Prior to versions 4.0.22, 4.1.11, 4.2.6, and 4.3.0, accept_content/2 at line 56 calls rabbit_stream_manager:create_super_stream/... directly after is_authorized (which only checks the management tag + vhost access via is_authorized_vhost). The stream-protocol equivalent (rabbit_stream_reader.erl create_super_stream handler) calls rabbit_stream_utils:check_super_stream_management_permitted/4 which enforces configure on the exchange and each partition queue. The HTTP handler omits this call entirely. A user with management tag and vhost access , but no configure permission on any resource , can create super-streams (an exchange + N partition stream queues + bindings) via the HTTP API. The native stream-protocol path enforces configure on each resource; the HTTP path does not, creating a privilege escalation from 'can view' to 'can create persistent cluster-wide resources.' Preconditions include rabbitmq_stream_management plugin enabled management tag + vhost access (no resource permissions needed). This issue is fixed in versions 4.0.22, 4.1.11, 4.2.6, and 4.3.0.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 23, 2026

Last Modified

October 19, 2026

Advisory Details (3)

Auto-updated Oct 19, 2026
Patch available. Sources: github_release, github.
GitHub advisoryMentions a patch (unverified)

Super-stream HTTP creation skips configure-permission check · Advisory · rabbitmq/rabbitmq-server · GitHub

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-34jw-rm7g-hph4
GitHub release Patch Available

RabbitMQ 4.3.0

Patch available: rabbitmq/rabbitmq-server v4.3.0

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0
GitHub release Patch Available

RabbitMQ 4.2.6

Patch available: rabbitmq/rabbitmq-server v4.2.6

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6

Vendor Advisories for CVE-2026-67218(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrabbitmq-server4-3-main-4.3.6-1.hum12026-09-15redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 2 ecosystems)
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 ... 4.3.0-1 (9 versions)
  • every version up to 4.3.0-2: fixed in 4.3.0-2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 48× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-10-29 14:43 UTCEG score recompute
  6. 2026-10-29 14:43 UTCVendor advisory
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-10-28 12:55 UTCOSV refresh
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-10-25 14:10 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  18. 2026-10-19 20:49 UTCEG score recompute▲ 4.40
  19. 2026-10-19 20:49 UTCVendor advisory
  20. 2026-10-19 20:45 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  21. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-18 03:20 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.3% · 25th percentile
Show 40 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-12 15:46 UTCEG score recompute
  6. 2026-10-11 19:30 UTCEG score recompute
  7. 2026-10-11 16:46 UTCEG score recompute
  8. 2026-10-11 14:07 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-11 03:36 UTCEG score recompute
  11. 2026-10-11 03:36 UTCVendor advisory
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-10-08 09:20 UTCEG score recompute
  16. 2026-10-08 09:20 UTCVendor advisory
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  20. 2026-10-05 15:21 UTCEG score recompute
  21. 2026-10-05 15:21 UTCVendor advisory
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-10-02 21:10 UTCEG score recompute
  25. 2026-10-02 21:10 UTCVendor advisory
  26. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  27. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  28. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  29. 2026-09-30 03:08 UTCEG score recompute
  30. 2026-09-30 03:08 UTCVendor advisory
  31. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  32. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  33. 2026-09-27 09:09 UTCEG score recompute
  34. 2026-09-27 09:09 UTCVendor advisory
  35. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  36. 2026-09-24 14:34 UTCEG score recompute
  37. 2026-09-24 14:17 UTCEG score recompute
  38. 2026-09-23 21:22 UTCEG score recompute
  39. 2026-09-23 20:48 UTCEG score recomputeFirst assessed: 2.1 LOW
  40. 2026-09-23 20:48 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-67218?
CVE-2026-67218 is a medium-severity vulnerability; its CVE record was published on September 23, 2026. RabbitMQ is a messaging and streaming broker. Prior to versions 4.0.22, 4.1.11, 4.2.6, and 4.3.0, accept_content/2 at line 56 calls rabbit_stream_manager:create_super_stream/... directly after is_authorized (which only checks the management tag + vhost access via is_authorized_vhost). The…
When was the CVE record for CVE-2026-67218 published?
The CVE record for CVE-2026-67218 was published on September 23, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 19, 2026; the record at its source may have been updated since.
Is CVE-2026-67218 actively exploited?
CVE-2026-67218 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67218?
CVE-2026-67218 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-67218?
A fix for CVE-2026-67218 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67218 are linked in the Vendor Advisories panel on this page.

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