CVE-2026-44236

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Source
https://cve.org/CVERecord?id=CVE-2026-44236
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44236.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44236
Aliases
  • GHSA-jh48-qjf5-fx5v
Downstream
Published
2026-09-17T17:04:18Z
Modified
2026-09-18T03:46:37Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H CVSS Calculator
Summary
rabbitmq-c: Heap buffer overflow in AMQP login handshake via undersized connection.tune.frame_max
Details

rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized connection.tune.frame_max value during amqp_login(), and rabbitmq-c accepts the value in amqp_login_inner() in librabbitmq/amqp_socket.c. amqp_tune_connection() in librabbitmq/amqp_connection.c uses frame_max to reallocate the outbound buffer without enforcing AMQP_FRAME_MIN_SIZE. Immediate serialization of connection.tune-ok through amqp_frame_to_bytes() writes beyond the undersized heap allocation, causing memory corruption and likely denial of service. An on-path attacker can also trigger the flaw against plaintext AMQP traffic. Code execution is theoretically possible but was not demonstrated. This issue is fixed in version 0.16.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44236.json"
}
References

Affected packages

Git / github.com/alanxz/rabbitmq-c

Affected ranges

Type
GIT
Repo
https://github.com/alanxz/rabbitmq-c
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
800d57c9ca7352181167ec3c6aba66b8518c321c
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.16.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

0.*
0.2
librabbitmq-0.*
librabbitmq-0.1-amqp_0_8
rabbitmq-c-v0.*
rabbitmq-c-v0.3.0
v0.*
v0.1
v0.10.0
v0.11.0
v0.12.0
v0.13.0
v0.14.0
v0.15.0
v0.2
v0.3.0
v0.4.0
v0.4.0-test
v0.5.0
v0.5.1
v0.5.2
v0.6.0
v0.7.0
v0.7.1
v0.8.0
v0.9.0-master

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44236.json"