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Advisory severityHigh7.7Vendor: MediumRed Hat Linux

High [CVE-2026-57212] Denial of Service via oversized JSON bodies in HTTP API

This high-severity Red Hat Linux advisory covers CVE-2026-57212 affecting Red Hat Hardened Images.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-57212 Source published Source updated

VulniPulse record published Record updated

CVE-2026-57212
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths because read_complete_body checks the accumulated size before the final chunk but not the final combined size.

This issue is fixed in versions 3.13.14, 4.0.19, 4.1.10, and 4.2.5. The API's body size check is incomplete, allowing the final combined size to exceed limits.

This could lead to a Denial of Service (DoS) due to excessive resource consumption. Red Hat severity: Moderate — CVSS 7.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

Weakness: CWE-770. Affected Red Hat products: Red Hat Hardened Images.

Red Hat lists Red Hat OpenStack Platform 16.2; Red Hat OpenStack Platform 17.1; Red Hat OpenStack Platform 18.0 as not affected. Red Hat fixing advisory: RHSA-2026:35939, RHSA-2026:35940.

Is CVE-2026-57212 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-57212 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-57212?

Upgrade to a fixed release named by Red Hat:

  • 3.13.14
  • 4.0.19
  • 4.1.10
  • 4.2.5
  • rabbitmq-server4-3-main-4.3.2-1.hum1
  • rabbitmq-server4-2-main-4.2.8-1.hum1
  • RHSA-2026:35939
  • RHSA-2026:35940

Confirm against the vendor advisory before you patch.

Affected versions
  • < 3.13.14
  • < 4.0.19
  • < 4.1.10
  • < 4.2.5

Official advisory · high-confidence parse· fetched 1 day ago·verify at source

Fixed versions
  • 3.13.14
  • 4.0.19
  • 4.1.10
  • 4.2.5
  • rabbitmq-server4-3-main-4.3.2-1.hum1
  • rabbitmq-server4-2-main-4.2.8-1.hum1
  • RHSA-2026:35939
  • RHSA-2026:35940

Official advisory · high-confidence parse· fetched 1 day ago·verify at source

Mitigation

Upgrade to a fixed release: 3.13.14, 4.0.19, 4.1.10, 4.2.5, rabbitmq-server4-3-main-4.3.2-1.hum1, rabbitmq-server4-2-main-4.2.8-1.hum1. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 1 day ago·verify at source

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