rabbitmq-c: Heap buffer overflow in AMQP login handshake via undersized connection.tune.frame_max
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.
BIT-rabbitmq-c-2026-44236
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:BIT-rabbitmq-c-2026-44236
rabbitmq-c
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.16.0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.16.0"
}
]
}
],
"package": {
"name": "rabbitmq-c",
"purl": "pkg:bitnami/rabbitmq-c",
"ecosystem": "Bitnami"
},
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H"
}
],
"database_specific": {
"source": "https://github.com/bitnami/vulndb/tree/main/data/rabbitmq-c/BIT-rabbitmq-c-2026-44236.json"
}
}
]- Related CVEs
- CVE-2026-44236
Source reference:
/aliases
Publisher severity
high
Source reference: /database_specific/severity
- Event
- #25978 · Revision 1
- Added to Heist Feed
- Publisher date