CVE-2026-57216

CRITICALNVD 10.010.0
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.5% (41st 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 — 3 sources updated this weekElevated
10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 10.0Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
61
EG Risk 61/100

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 (value × EchelonGraph’s weight)
Severity100% × 45%
The EG Score, 10.0 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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
0.5%
EPSS %ILE
41st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation public PoC (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.

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

July 10, 2026

Last Modified

October 9, 2026

Advisory Details (6)

Auto-updated Oct 9, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
GitHub advisoryMentions a patch (unverified)

AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks · Advisory · rabbitmq/rabbitmq-server · GitHub

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw
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
GitHub pull request

Use `peername/1` over `sockname/1` in a few places (backport #15936) (backport #15939)

Fix merged in rabbitmq/rabbitmq-server PR #15940 on 2026-04-06 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/pull/15940
GitHub pull request

Use `peername/1` over `sockname/1` in a few places

Fix merged in rabbitmq/rabbitmq-server PR #15936 on 2026-04-06 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/pull/15936
GitHub commit

commit 9f8c39fcf0ac (rabbitmq/rabbitmq-server)

Fix landed in rabbitmq/rabbitmq-server commit 9f8c39fcf0ac — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112
GitHub commit

commit 7273c9eb6920 (rabbitmq/rabbitmq-server)

Fix landed in rabbitmq/rabbitmq-server commit 7273c9eb6920 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47

Vendor Advisories for CVE-2026-57216(3)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrabbitmq-server4-3-main-4.3.2-1.hum12026-07-06redhat
redhatrabbitmq-server4-2-main-4.2.8-1.hum12026-07-06redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
rabbitmq-server3.10.8-1 ... 4.3.2-4 (38 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
rabbitmq-server3.10.8-1.1 ... 4.3.6-1 (29 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
rabbitmq-server4.0.5-10 ... 4.3.6-1 (19 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 18× in last 7d / 49× 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.

Showing the most recent 100 of 336 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 236 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 08:53 UTCEG score recompute
  2. 2026-10-14 08:53 UTCVendor advisory
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-10-13 05:12 UTCEG score recompute
  5. 2026-10-13 05:12 UTCVendor advisory
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-10-12 15:54 UTCEG score recompute
  8. 2026-10-12 06:46 UTCVendor advisory
  9. 2026-10-11 19:37 UTCEG score recompute
  10. 2026-10-11 16:52 UTCEG score recompute
  11. 2026-10-11 14:15 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-09 10:51 UTCEG score recompute
  16. 2026-10-09 10:51 UTCVendor advisory
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-10-01 14:57 UTCEG score recompute
Show 75 more
  1. 2026-10-01 14:57 UTCVendor advisory
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-28 09:46 UTCEG score recompute
  6. 2026-09-28 09:46 UTCVendor advisory
  7. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  10. 2026-09-24 11:09 UTCEG score recompute
  11. 2026-09-24 11:09 UTCVendor advisory
  12. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  13. 2026-09-23 09:43 UTCVendor advisory
  14. 2026-09-23 05:44 UTCEG score recompute
  15. 2026-09-23 05:44 UTCVendor advisory
  16. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  18. 2026-09-18 10:08 UTCVendor advisory
  19. 2026-09-18 05:17 UTCEG score recompute
  20. 2026-09-18 05:17 UTCVendor advisory
  21. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  24. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  25. 2026-09-14 11:37 UTCVendor advisory
  26. 2026-09-14 07:36 UTCVendor advisory
  27. 2026-09-14 03:37 UTCVendor advisory
  28. 2026-09-13 23:38 UTCEG score recompute
  29. 2026-09-13 23:38 UTCVendor advisory
  30. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  31. 2026-09-13 16:41 UTCVendor advisory
  32. 2026-09-13 12:10 UTCVendor advisory
  33. 2026-09-13 08:11 UTCEG score recompute
  34. 2026-09-13 08:11 UTCVendor advisory
  35. 2026-09-12 13:32 UTCVendor advisory
  36. 2026-09-12 02:49 UTCEG score recompute
  37. 2026-09-12 02:49 UTCVendor advisory
  38. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  39. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  40. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  41. 2026-09-08 02:45 UTCEG score recompute
  42. 2026-09-08 02:45 UTCVendor advisory
  43. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  44. 2026-09-06 13:56 UTCEG score recompute
  45. 2026-09-06 13:56 UTCVendor advisory
  46. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  47. 2026-09-06 01:46 UTCVendor advisory
  48. 2026-09-05 21:40 UTCEG score recompute
  49. 2026-09-05 21:40 UTCVendor advisory
  50. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  51. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  52. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  53. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  54. 2026-08-31 00:32 UTCVendor advisory
  55. 2026-08-30 20:33 UTCEG score recompute
  56. 2026-08-30 20:33 UTCVendor advisory
  57. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  58. 2026-08-30 16:34 UTCVendor advisory
  59. 2026-08-30 11:11 UTCVendor advisory
  60. 2026-08-30 06:14 UTCEG score recompute
  61. 2026-08-30 06:14 UTCVendor advisory
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  63. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  64. 2026-08-28 02:38 UTCVendor advisory
  65. 2026-08-27 21:40 UTCEG score recompute
  66. 2026-08-27 21:40 UTCVendor advisory
  67. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  68. 2026-08-27 00:46 UTCEG score recompute
  69. 2026-08-27 00:46 UTCVendor advisory
  70. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  71. 2026-08-26 12:53 UTCVendor advisory
  72. 2026-08-26 08:16 UTCVendor advisory
  73. 2026-08-26 03:32 UTCVendor advisory
  74. 2026-08-25 13:56 UTCEG score recompute
  75. 2026-08-25 13:56 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-57216?
CVE-2026-57216 is a critical-severity vulnerability; its CVE record was published on July 10, 2026. RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend…
When was the CVE record for CVE-2026-57216 published?
The CVE record for CVE-2026-57216 was published on July 10, 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-57216 actively exploited?
CVE-2026-57216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57216?
CVE-2026-57216 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-57216?
A fix for CVE-2026-57216 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-57216 are linked in the Vendor Advisories panel on this page.

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