SB2026090848 - Ubuntu update for librabbitmq
Published: September 8, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Insufficiently protected credentials (CVE-ID: CVE-2023-35789)
CWE-ID: CWE-522 - Insufficiently Protected Credentials
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to the C AMQP client library for RabbitMQ requires credentials to be entered on the command line as arguments for amqp-publish and amqp-consume. A local user can view the list of processes on the system and obtain credentials to RabbitMQ deployment.
2) Integer underflow (CVE-ID: CVE-2026-44235)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an integer underflow in AMQP frame length computation in amqp_handle_input() when parsing an undersized AMQP frame. A remote attacker can send a specially crafted undersized AMQP frame to cause a denial of service.
User interaction is required for a victim application to connect to an attacker-controlled AMQP server.
3) Heap-based buffer overflow (CVE-ID: CVE-2026-44236)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in amqp_login_inner() and the outbound frame buffer handling when processing a server-supplied connection.tune frame during the amqp_login() handshake. A remote attacker can send a connection.tune frame with an undersized frame_max value to cause a denial of service.
User interaction is required for a victim application to connect to the malicious AMQP server.
4) Integer overflow (CVE-ID: CVE-2026-59986)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information or cause a denial of service.
The vulnerability exists due to an integer overflow in the amqp_decode_bytes function when parsing AMQP BYTES or UTF8 field lengths. A remote attacker can send a crafted AMQP frame containing an oversized field length to disclose sensitive information or cause a denial of service.
Only 32-bit systems are affected; exploitation may require a malicious AMQP broker or a man-in-the-middle position on an unencrypted connection.
5) Heap-based buffer overflow (CVE-ID: CVE-2026-61547)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to a heap-based buffer overflow in amqp_frame_to_bytes() when serializing an oversized AMQP_FRAME_BODY through amqp_send_frame(). A remote attacker can provide an oversized AMQP_FRAME_BODY frame to cause memory corruption.
The overflow occurs while serializing the frame, before any network communication with a RabbitMQ broker.
Remediation
Install update from vendor's website.