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CVE-2026-57218

RabbitMQ: AMQP 0-9-1 in combination with OAuth 2: consumer persistence can lead to post-revocation message disclosure

4.9 MediumFix available

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
None

Exploit likelihood

0.35%Up 0.1 points since Jul 11, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.9

RabbitMQ: AMQP 0-9-1 in combination with OAuth 2: consumer persistence can lead to post-revocation message disclosure

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
CVE-2026-57218
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Weakness
CWE-863
Updated
2026-11-02
EUVDEUVD-2026-43020 4.9

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
EUVD-2026-43020
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Updated
2026-11-02
NVD 4.9

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
CVE-2026-57218
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-863
Updated
2026-11-02
OSV 4.9

RabbitMQ: AMQP 0-9-1 in combination with OAuth 2: consumer persistence can lead to post-revocation message disclosure

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
CVE-2026-57218
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Weakness
CWE-863
Updated
2026-11-02
OSVDEBIAN-CVE-2026-57218 6.5

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
DEBIAN-CVE-2026-57218
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVRHSA-2026:35939 10.0

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:35939
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVRHSA-2026:35940 10.0

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:35940
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-57218 4.9

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
UBUNTU-CVE-2026-57218
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVAZL-92346 No score

CVE-2026-57218 affecting package rabbitmq-server for versions less than 3.13.7-8

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Record
AZL-92346
Updated
2026-11-05
OSVopenSUSE-SU-2026:21903-1 No score

Security update for rabbitmq-server

This update for rabbitmq-server fixes the following issues:

  • CVE-2026-44839: XSS in management UI due to unsanitized vhost names (bsc#1266465).
  • CVE-2026-57212: The rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths (bsc#1271318).
  • CVE-2026-57213: stored XSS in RabbitMQ federation management plugin via unsanitized consumer_tag rendering (bsc#1271336).
  • CVE-2026-57214: stored XSS in RabbitMQ management UI (bsc#1271337).
  • CVE-2026-57215: direct-reply-to binding persistence can lead to unauthorized reply-channel injection and persistent phantom (bsc#1271338).
  • CVE-2026-57216: stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks (bsc#1271339).
  • CVE-2026-57217: topic authorization can lead to cross-tenant routing-key bypass (bsc#1271340).
  • CVE-2026-57218: consumer persistence can lead to post-revocation message disclosure in OAuth2 (bsc#1271343).
  • CVE-2026-57219: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations (bsc#1271344).
  • CVE-2026-57220: stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS (bsc#1271345).
  • CVE-2026-57221: passive queue/exchange declaration bypasses authorization checks, leaking queue metadata to unprivileged users (bsc#1271346).
Record
openSUSE-SU-2026:21903-1
Updated
2026-11-02
OSVSUSE-SU-2026:23859-1 No score

Security update for rabbitmq-server

This update for rabbitmq-server fixes the following issues:

  • CVE-2026-44839: XSS in management UI due to unsanitized vhost names (bsc#1266465).
  • CVE-2026-57212: The rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths (bsc#1271318).
  • CVE-2026-57213: stored XSS in RabbitMQ federation management plugin via unsanitized consumer_tag rendering (bsc#1271336).
  • CVE-2026-57214: stored XSS in RabbitMQ management UI (bsc#1271337).
  • CVE-2026-57215: direct-reply-to binding persistence can lead to unauthorized reply-channel injection and persistent phantom (bsc#1271338).
  • CVE-2026-57216: stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks (bsc#1271339).
  • CVE-2026-57217: topic authorization can lead to cross-tenant routing-key bypass (bsc#1271340).
  • CVE-2026-57218: consumer persistence can lead to post-revocation message disclosure in OAuth2 (bsc#1271343).
  • CVE-2026-57219: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations (bsc#1271344).
  • CVE-2026-57220: stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS (bsc#1271345).
  • CVE-2026-57221: passive queue/exchange declaration bypasses authorization checks, leaking queue metadata to unprivileged users (bsc#1271346).
Record
SUSE-SU-2026:23859-1
Updated
2026-11-02
OSVSUSE-SU-2026:23869-1 No score

Security update for rabbitmq-server

This update for rabbitmq-server fixes the following issues:

  • CVE-2026-44839: XSS in management UI due to unsanitized vhost names (bsc#1266465).
  • CVE-2026-57212: The rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths (bsc#1271318).
  • CVE-2026-57213: stored XSS in RabbitMQ federation management plugin via unsanitized consumer_tag rendering (bsc#1271336).
  • CVE-2026-57214: stored XSS in RabbitMQ management UI (bsc#1271337).
  • CVE-2026-57215: direct-reply-to binding persistence can lead to unauthorized reply-channel injection and persistent phantom (bsc#1271338).
  • CVE-2026-57216: stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks (bsc#1271339).
  • CVE-2026-57217: topic authorization can lead to cross-tenant routing-key bypass (bsc#1271340).
  • CVE-2026-57218: consumer persistence can lead to post-revocation message disclosure in OAuth2 (bsc#1271343).
  • CVE-2026-57219: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations (bsc#1271344).
  • CVE-2026-57220: stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS (bsc#1271345).
  • CVE-2026-57221: passive queue/exchange declaration bypasses authorization checks, leaking queue metadata to unprivileged users (bsc#1271346).
Record
SUSE-SU-2026:23869-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rabbitmq-server
Azure Linux:3
 before 3.13.7-8
3.13.7-8
rabbitmq-server
Debian:14
 before 4.3.0-2, plus listed versions
4.0.5-104.0.5-114.0.5-124.0.5-134.0.5-14
Show 4 moreShow less
4.0.5-64.0.5-84.0.5-94.3.0-1
4.3.0-2
rabbitmq-server4.3
Red Hat:hummingbird:1
From an advisory covering 11 CVEs
 before 0:4.3.2-1.hum1
0:4.3.2-1.hum1
rabbitmq-server4.2
Red Hat:hummingbird:1
From an advisory covering 11 CVEs
 before 0:4.2.8-1.hum1
0:4.2.8-1.hum1
rabbitmq-server
SUSE:Linux Enterprise Server 16.0
From an advisory covering 11 CVEs
 before 4.1.5-160000.2.1
4.1.5-160000.2.1
rabbitmq-server
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 11 CVEs
 before 4.1.5-160000.2.1
4.1.5-160000.2.1
rabbitmq-server
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
3.5.4-13.5.4-33.5.4-3.13.5.7-13.5.7-1ubuntu0.16.04.1
Show 5 moreShow less
3.5.7-1ubuntu0.16.04.23.5.7-1ubuntu0.16.04.43.5.7-1ubuntu0.16.04.4+esm13.5.7-1ubuntu0.16.04.4+esm23.5.7-1ubuntu0.16.04.4+esm3
 None known
rabbitmq-server
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
3.6.10-13.6.10-1ubuntu0.13.6.10-1ubuntu0.33.6.10-1ubuntu0.43.6.10-1ubuntu0.53.6.10-1ubuntu0.5+esm1
 None known
rabbitmq-server
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
3.7.8-4ubuntu23.7.18-13.8.2-0ubuntu13.8.2-0ubuntu1.13.8.2-0ubuntu1.2
Show 8 moreShow less
3.8.2-0ubuntu1.33.8.2-0ubuntu1.43.8.2-0ubuntu1.53.8.3-0ubuntu0.13.8.3-0ubuntu0.23.8.3-0ubuntu0.33.8.3-0ubuntu0.3+esm13.8.3-0ubuntu0.3+esm2
 None known
rabbitmq-server
Ubuntu:22.04:LTS
 All versions, plus listed versions
3.8.9-3ubuntu13.9.8-13.9.8-23.9.8-33.9.8-5
Show 8 moreShow less
3.9.8-63.9.13-13.9.13-1ubuntu0.22.04.13.9.13-1ubuntu0.22.04.23.9.27-0ubuntu0.13.9.27-0ubuntu0.23.9.27-0ubuntu0.53.9.27-0ubuntu0.6
 None known
Show 4 moreShow less
Affected packages
PackageAffectedFixed
rabbitmq-server
Ubuntu:24.04:LTS
 All versions, plus listed versions
3.12.1-13.12.1-1ubuntu13.12.1-1ubuntu1.23.12.1-1ubuntu1.43.12.1-1ubuntu1.63.12.1-1ubuntu1.7
 None known
rabbitmq-server
Ubuntu:26.10
 All versions, plus listed versions
4.0.5-10ubuntu54.3.2-4ubuntu24.3.2-4ubuntu3
 None known
rabbitmq-server
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.0.5-8ubuntu24.0.5-10ubuntu14.0.5-10ubuntu24.0.5-10ubuntu34.0.5-10ubuntu44.0.5-10ubuntu54.0.5-10ubuntu5.14.0.5-10ubuntu5.2
 None known
rabbitmq-server
openSUSE:Leap 16.0
From an advisory covering 11 CVEs
 before 4.1.5-160000.2.1
4.1.5-160000.2.1

History

History
RecordedChangedSources
affected
factsOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-57218 is a medium vulnerability (CVSS 4.9) in Broadcom Rabbitmq Server, published July 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 29th percentile. Fixed in rabbitmq-server 3.13.7-8.

References

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