How severe is CVE-2026-57221?

CVE-2026-57221 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-57221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-57221?

CVE-2026-57221 affects Broadcom Rabbitmq Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-57221?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-57221 published?

CVE-2026-57221 was published on 2026-07-10 and last updated on 2026-07-13.

CVE-2026-57221

CVE-2026-57221 is a medium-severity vulnerability in Broadcom Rabbitmq Server with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
CVSS v4: 5.3
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Broadcom Rabbitmq Server
Published: 2026-07-10
Last modified: 2026-07-13

Description

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, RabbitMQ does not perform authorization checks on passive queue.declare and exchange.declare AMQP 0-9-1 operations, allowing any authenticated user who can connect to a virtual host to enumerate queue and exchange names and read queue message and consumer counts. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Frequently asked questions

What is CVE-2026-57221?: RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, RabbitMQ does not perform authorization checks on passive queue.declare and exchange.declare AMQP 0-9-1 operations, allowing any authenticated user who can connect to a virtual host to enumerate queue and exchange names and read queue message and consumer counts. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
How severe is CVE-2026-57221?: CVE-2026-57221 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-57221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-57221?: CVE-2026-57221 affects Broadcom Rabbitmq Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-57221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-57221 published?: CVE-2026-57221 was published on 2026-07-10 and last updated on 2026-07-13.

References

Affected products (1)

cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*

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