Critical severity · published Dec 29, 2016
CVE-2016-9877
An issue was discovered in Pivotal RabbitMQ 3.x before 3.5.8 and 3.6.x before 3.6.6 and RabbitMQ for PCF 1.5.x before 1.5.20, 1.6.x before 1.6.12, and 1.7.x before 1.7.7
9.8
CVSS
1.4%
EPSS
No
On KEV
Description
An issue was discovered in Pivotal RabbitMQ 3.x before 3.5.8 and 3.6.x before 3.6.6 and RabbitMQ for PCF 1.5.x before 1.5.20, 1.6.x before 1.6.12, and 1.7.x before 1.7.7. MQTT (MQ Telemetry Transport) connection authentication with a username/password pair succeeds if an existing username is provided but the password is omitted from the connection request. Connections that use TLS with a client-provided certificate are not affected.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Rabbitmq · Pivotal Software
3.5.4; 3.5.5; 3.5.7; 3.6.0; 3.6.1; 3.6.2; +34 more · source: NVD
RS
Rabbitmq Server · Broadcom
3.0.0; 3.0.1; 3.0.2; 3.0.3; 3.0.4; 3.1.0; +26 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-9877
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-9877
www.debian.org
http://www.debian.org/security/2017/dsa-3761
www.securityfocus.com
http://www.securityfocus.com/bid/95065
Mitigation
https://pivotal.io/security/cve-2016-9877
support.hpe.com
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03880en_us
More from Rabbitmq Server
10.0
CVE-2026-57216
RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks
10.0
CVE-2026-57211
RabbitMQ: UNC SSRF affecting the management UI on Windows
9.3
CVE-2026-67237
RabbitMQ: Reflected XSS via the OAuth bootstrap JS endpoint
9.1
CVE-2026-67231
RabbitMQ: Trust-store whitelist by Issuer+Serial only
8.8
CVE-2026-66070
RabbitMQ: CORS * reflects Origin with Allow-Credentials