CVE-2026-57220

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (44th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 7.5Exploit: No code on recordExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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 Jul 10, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

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 pull request

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 pull request

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 / 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 42× 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 222 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 122 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-12 15:54 UTCEG score recompute
  4. 2026-10-11 19:37 UTCEG score recompute
  5. 2026-10-11 16:52 UTCEG score recompute
  6. 2026-10-11 14:15 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-09 10:51 UTCEG score recompute
  11. 2026-10-09 10:51 UTCVendor advisory
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-01 14:57 UTCEG score recompute
  21. 2026-10-01 14:57 UTCVendor advisory
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-28 09:46 UTCEG score recompute
Show 75 more
  1. 2026-09-28 09:46 UTCVendor advisory
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-09-24 14:04 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  5. 2026-09-24 11:09 UTCEG score recompute
  6. 2026-09-24 11:09 UTCVendor advisory
  7. 2026-09-23 17:54 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  8. 2026-09-23 05:44 UTCEG score recompute
  9. 2026-09-23 05:44 UTCVendor advisory
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  12. 2026-09-18 05:17 UTCEG score recompute
  13. 2026-09-18 05:17 UTCVendor advisory
  14. 2026-09-17 19:31 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  15. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  16. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  17. 2026-09-15 03:11 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  18. 2026-09-14 11:17 UTCVendor advisory
  19. 2026-09-13 23:38 UTCEG score recompute
  20. 2026-09-13 23:38 UTCVendor advisory
  21. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  22. 2026-09-13 08:11 UTCEG score recompute
  23. 2026-09-13 08:11 UTCVendor advisory
  24. 2026-09-12 14:28 UTCVendor advisory
  25. 2026-09-12 02:49 UTCEG score recompute
  26. 2026-09-12 02:49 UTCVendor advisory
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  28. 2026-09-10 09:35 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  29. 2026-09-08 22:01 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  30. 2026-09-08 02:45 UTCEG score recompute
  31. 2026-09-08 02:45 UTCVendor advisory
  32. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  33. 2026-09-06 13:56 UTCEG score recompute
  34. 2026-09-06 13:56 UTCVendor advisory
  35. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  36. 2026-09-05 21:40 UTCEG score recompute
  37. 2026-09-05 21:40 UTCVendor advisory
  38. 2026-09-04 05:07 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  39. 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  40. 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  41. 2026-09-01 04:40 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  42. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  43. 2026-08-30 17:53 UTCVendor advisory
  44. 2026-08-30 06:14 UTCEG score recompute
  45. 2026-08-30 06:14 UTCVendor advisory
  46. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.0% · 58th percentile
  47. 2026-08-28 21:42 UTCEPSS rescoreEPSS 1.0% · 58th percentile
  48. 2026-08-27 21:40 UTCEG score recompute
  49. 2026-08-27 21:40 UTCVendor advisory
  50. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  51. 2026-08-27 00:46 UTCEG score recompute
  52. 2026-08-27 00:46 UTCVendor advisory
  53. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  54. 2026-08-26 03:32 UTCEG score recompute
  55. 2026-08-26 03:32 UTCVendor advisory
  56. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  57. 2026-08-25 07:52 UTCVendor advisory
  58. 2026-08-24 20:13 UTCEG score recompute
  59. 2026-08-24 20:13 UTCVendor advisory
  60. 2026-08-24 03:56 UTCVendor advisory
  61. 2026-08-23 14:29 UTCVendor advisory
  62. 2026-08-23 02:50 UTCEG score recompute
  63. 2026-08-23 02:50 UTCVendor advisory
  64. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  65. 2026-08-22 15:10 UTCVendor advisory
  66. 2026-08-22 03:31 UTCEG score recompute
  67. 2026-08-22 03:31 UTCVendor advisory
  68. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  69. 2026-08-21 14:42 UTCVendor advisory
  70. 2026-08-21 03:02 UTCEG score recompute
  71. 2026-08-21 03:02 UTCVendor advisory
  72. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  73. 2026-08-20 15:11 UTCVendor advisory
  74. 2026-08-20 01:32 UTCEG score recompute
  75. 2026-08-20 01:32 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-57220?
CVE-2026-57220 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-57220 published?
The CVE record for CVE-2026-57220 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-2026-57220 actively exploited?
CVE-2026-57220 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57220?
CVE-2026-57220 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-57220?
A fix for CVE-2026-57220 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-57220 are linked in the Vendor Advisories panel on this page.

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