RabbitMQ: AMQP 1.0 symbolic body descriptor prefix collisions bypass validation
Summary
| CVE | CVE-2026-67416 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-14 16:17:50 UTC |
| Updated | 2026-10-16 16:00:33 UTC |
| Description | RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, the optimized AMQP 1.0 server_mode parser in deps/amqp10_common/src/amqp10_binary_parser.erl matches the textual prefixes of symbolic data, sequence, and value body descriptors without verifying their encoded symbol lengths. An authenticated AMQP 1.0 publisher with write permission can submit a well-formed unknown descriptor that begins with a registered body descriptor, and RabbitMQ misclassifies and stores the bytes as a standard body section. Strict AMQP 1.0 consumers can terminate while decoding the stored entry. For bodies misclassified as data, AMQP 0-9-1 or other cross-protocol conversion performs full body decoding and can terminate the consumer protocol process, with acknowledgement-required delivery permitting repeated failures. Sequence and value classifications are normally transported as opaque encoded payloads on that conversion path. The broker remains alive, and the issue does not bypass routing or authorization. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4. |
Risk And Classification
Primary CVSS: v4.0 5.3 MEDIUM from [email protected]
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-20 | CWE-248 | CWE-754 | CWE-20 CWE-20: Improper Input Validation | CWE-248 CWE-248: Uncaught Exception | CWE-754 CWE-754: Improper Check for Unusual or Exceptional Conditions
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 5.3 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | DECLARED | 5.3 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
LowUser Interaction
NoneConfidentiality
NoneIntegrity
NoneAvailability
LowSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Rabbitmq | Rabbitmq-server | affected >= 4.0.0, < 4.0.24 | Not specified |
| CNA | Rabbitmq | Rabbitmq-server | affected >= 4.1.0, < 4.1.15 | Not specified |
| CNA | Rabbitmq | Rabbitmq-server | affected >= 4.2.0, < 4.2.10 | Not specified |
| CNA | Rabbitmq | Rabbitmq-server | affected >= 4.3.0, < 4.3.4 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-p35w-6mx2-q4pc | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | github.com | |
| github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.4 | [email protected] | github.com | |
| github.com/rabbitmq/rabbitmq-server/pull/17287 | [email protected] | github.com | |
| github.com/rabbitmq/rabbitmq-server/commit/c9b4b10c2dbf0f1c89f10b482ac8b... | [email protected] | github.com | |
| github.com/rabbitmq/rabbitmq-server/commit/d5186e66e056960f58e2d0fbee2fc... | [email protected] | github.com | |
| github.com/rabbitmq/rabbitmq-server/pull/17017 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.