NATS Server: Subscribe Authz Bypass via Wildcard-Overlap
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.3%
exploitation probability
0.3%top 73% of all CVEs
observed exploitation
nono source reports it
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected products
nats-io · nats-serverReferences
https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386bhttps://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6https://github.com/nats-io/nats-server/releases/tag/v2.11.16https://github.com/nats-io/nats-server/releases/tag/v2.12.7https://github.com/nats-io/nats-server/releases/tag/v2.14.0https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr