CVE-2026-57211

Q: How do I fix CVE-2026-57211?

Upgrade rabbitmq server to 4.2.6 or later.

Q: Is CVE-2026-57211 being actively exploited?

Not that we know of. CVE-2026-57211 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.63% is the estimated probability that it will be exploited in the next 30 days. That is higher than 48% of all scored CVEs.

Q: How severe is CVE-2026-57211?

CVE-2026-57211 has a CVSS v3 base score of 6.5, rated moderate. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-57211 affect?

Published advisories record a fix for rabbitmq server (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

6.5

CVSS v3

NVD

Description

RabbitMQ is a messaging and streaming broker. Prior to 4.1.11 and 4.2.6 on Windows, the RabbitMQ management plugin static file handler rabbit_mgmt_wm_static can pass URL-encoded backslashes to erl_prim_loader:read_file_info before path validation when multiple management extension plugins are enabled, causing outbound DNS and SMB requests to attacker-controlled UNC paths. This issue is fixed in versions 4.1.11 and 4.2.6.

CWE-36 CWE-918Server-Side Request Forgery (SSRF)

How to fix

Remediation Available

rabbitmq serverNVD

Affected:>= 4.1.0, < 4.2.6Fixed in:4.2.6CVE-2026-57211derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Exploit Intelligence

0.63%probability of exploitation in 30 days

48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

Patch3

Exploit1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-36 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-13159	Critical	9.8	100%	KEV	Fix
CVE-2018-20250	High	7.8	96%	KEV + Ransom	-
CVE-2024-48248	High	8.6	94%	KEV	Fix
CVE-2024-13160	Critical	9.8	91%	KEV	Fix
CVE-2024-13161	Critical	9.8	90%	KEV	Fix
CVE-2023-3765	Critical	10.0	68%	-	Fix

Common questions

How do I fix CVE-2026-57211?

Upgrade rabbitmq server to 4.2.6 or later.

Is CVE-2026-57211 being actively exploited?

Not that we know of. CVE-2026-57211 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.63% is the estimated probability that it will be exploited in the next 30 days. That is higher than 48% of all scored CVEs.

How severe is CVE-2026-57211?

CVE-2026-57211 has a CVSS v3 base score of 6.5, rated moderate. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-57211 affect?

Published advisories record a fix for rabbitmq server (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-13.