CVE-2026-57220

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.0%, top 41% of all CVEs by exploit prediction. 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 weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths and consume broker memory in rabbit_stream_core. This issue is fixed in version 4.2.6.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 13, 2026

Advisory Details (6)

Auto-updated Jul 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS · Advisory · rabbitmq/rabbitmq-server · GitHub

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q
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_pr

Limit heap size for unauthenticated connections (backport #16171) (backport #16172)

Fix merged in rabbitmq/rabbitmq-server PR #16173 on 2026-04-16 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/pull/16173
github_pr

Limit heap size for unauthenticated connections

Fix merged in rabbitmq/rabbitmq-server PR #16171 on 2026-04-16 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/pull/16171
github_commit

commit 773a49c4921e (rabbitmq/rabbitmq-server)

Fix landed in rabbitmq/rabbitmq-server commit 773a49c4921e — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e
github_commit

commit 595ec28fa162 (rabbitmq/rabbitmq-server)

Fix landed in rabbitmq/rabbitmq-server commit 595ec28fa162 — awaiting tagged release

https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547

Vendor Advisories for CVE-2026-57220(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 / EcosystemFixed in / 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 108× 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.

Showing the most recent 100 of 154 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-57220?
CVE-2026-57220 is a high vulnerability published on July 10, 2026. RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths…
When was CVE-2026-57220 disclosed?
CVE-2026-57220 was first published in the National Vulnerability Database on July 10, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57220 actively exploited?
CVE-2026-57220 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 41.2% of all scored CVEs.
What is the CVSS score of CVE-2026-57220?
CVE-2026-57220 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-57220?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57220, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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