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CVE-2026-58252
6.5 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): None (N)
- Availability (A): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): None (N)
Activity log
- Created suggestion
NATS Server: Subscribe Authz Bypass via Wildcard-Overlap
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.
References
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https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr x_refsource_CONFIRM
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https://github.com/nats-io/nats-server/releases/tag/v2.11.16 x_refsource_MISC
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https://github.com/nats-io/nats-server/releases/tag/v2.12.7 x_refsource_MISC
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https://github.com/nats-io/nats-server/releases/tag/v2.14.0 x_refsource_MISC
Affected products
nats-server
- ==< 2.11.16
- ==>= 2.12.0-preview.1, < 2.12.7
Package maintainers
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@derekcollison Derek Collison <derek@nats.io>
-
@swdunlop Scott W. Dunlop <swdunlop@gmail.com>