Motor.NET before 0.19.0 contains a denial of service vulnerability that allows a remote attacker who can publish to a consumed queue to crash the service permanently by sending a message with crafted cloudEvents headers. Attackers can supply an invalid cloudEvents:motorversion, a single double-quote header value, or an unparsable typed attribute such as cloudEvents:time to trigger an unhandled exception in ExtractCloudEvent that is treated as fatal, causing the application to stop and the unacknowledged message to be redelivered on restart, resulting in a permanent crash-loop.
https://www.vulncheck.com/advisories/motor-net-rabbitmq-denial-of-service-via-cloudevents-headers
https://github.com/GDATASoftwareAG/motornet/releases/tag/v0.19.0
https://github.com/GDATASoftwareAG/motornet/pull/1785
https://github.com/GDATASoftwareAG/motornet/commit/c45559c78e6925f53e192f8896880a622282effe
Published: 2026-10-22
Updated: 2026-10-22
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
Severity: High
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
Base Score: 8.7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Severity: High