CVE-2026-67416Public exploitNetwork attack vectorHinoki check available

Consumer crashes via symbolic descriptor prefix collisions

Published Oct 14, 2026 · Updated Oct 14, 2026

AMQP 1.0 parser DoS in RabbitMQ Server allows remote authenticated users to crash consumers via crafted symbolic descriptors. The server_mode parser in deps/amqp10_common/src/amqp10_binary_parser.erl ignores encoded symbol lengths when matching body descriptor prefixes, storing unknown descriptors as standard body sections. Exploitation requires publishing permission and a consumer that strictly decodes the entry or fully decodes misclassified data during protocol conversion; acknowledgement-required redelivery repeats failures, but the broker remains alive and routing and authorization remain enforced.

CVSS severity5.3
Medium
EPSS probability0.54%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

AMQP 1.0 parser DoS in RabbitMQ Server allows remote authenticated users to crash consumers via crafted symbolic descriptors. The server_mode parser in deps/amqp10_common/src/amqp10_binary_parser.erl ignores encoded symbol lengths when matching body descriptor prefixes, storing unknown descriptors as standard body sections. Exploitation requires publishing permission and a consumer that strictly decodes the entry or fully decodes misclassified data during protocol conversion; acknowledgement-required redelivery repeats failures, but the broker remains alive and routing and authorization remain enforced.

The record

CVE
CVE-2026-67416
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
RabbitMQ
Product
RabbitMQ Server
Classifications
CWE-248, CWE-20, CWE-754, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 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=>= 4.0.0, < 4.0.24
  2. Affected versionversion=>= 4.1.0, < 4.1.15
  3. Affected versionversion=>= 4.2.0, < 4.2.10
  4. Affected versionversion=>= 4.3.0, < 4.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RabbitMQ · RabbitMQ Serverversion=>= 4.0.0, < 4.0.24; version=>= 4.1.0, < 4.1.15; version=>= 4.2.0, < 4.2.10; version=>= 4.3.0, < 4.3.4

Published CVSS scores

5.3AISLECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L
5.3GitHub_MCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3RabbitMQCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-248Uncaught Exception
CWE-20Improper Input Validation
CWE-754Improper Check for Unusual or Exceptional Conditions
T1499.004Application 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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