CVE-2026-57212Public exploitNetwork attack vector

Authenticated service interruption via final-chunk size-check bypass

Published Jul 10, 2026 · Updated Jul 10, 2026

Request size limit bypass in RabbitMQ Server allows remote authenticated users to interrupt service through oversized management API JSON. The read_complete_body/3 helper checks only accumulated bytes before reading the final Cowboy chunk, then returns Acc plus Data without validating the combined length. Reachability requires the rabbitmq_management plugin and management API credentials; accepted oversized bodies consume parsing and operation resources and can interrupt broker availability.

CVSS severity7.1
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Request size limit bypass in RabbitMQ Server allows remote authenticated users to interrupt service through oversized management API JSON. The read_complete_body/3 helper checks only accumulated bytes before reading the final Cowboy chunk, then returns Acc plus Data without validating the combined length. Reachability requires the rabbitmq_management plugin and management API credentials; accepted oversized bodies consume parsing and operation resources and can interrupt broker availability.

The record

CVE
CVE-2026-57212
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
RabbitMQ
Product
RabbitMQ Server
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.13.0, < 3.13.14
  2. Affected versionversion=>= 4.0.0, < 4.0.19
  3. Affected versionversion=>= 4.1.0, < 4.1.10
  4. Affected versionversion=>= 4.2.0, < 4.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RabbitMQ · RabbitMQ Serverversion=>= 3.13.0, < 3.13.14; version=>= 4.0.0, < 4.0.19; version=>= 4.1.0, < 4.1.10; version=>= 4.2.0, < 4.2.5

Published CVSS scores

7.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
7.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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