Medium 6.5Published Jul 8, 2026

CVE-2026-58252NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

Updated under an hour ago (Oct 27, 2026, 4:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for nats-io nats-server

Exploited in the last 30 days

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: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-285
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nats-io nats-server nats_io:nats_server (from the name)	before 2.11.16; from 2.12.0-preview.1, < 2.12.7	CNA record
linuxfoundation nats-server linuxfoundation:nats-server	before 2.11.16; from 2.12.0 before 2.12.7	NVD

References

References

https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr	x-refsource-confirm, vendor-advisory
https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b	x-refsource-misc, patch
https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854	x-refsource-misc, patch
https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6	x-refsource-misc, patch
https://github.com/nats-io/nats-server/releases/tag/v2.11.16	x-refsource-misc, release-notes
https://github.com/nats-io/nats-server/releases/tag/v2.12.7	x-refsource-misc, release-notes
https://github.com/nats-io/nats-server/releases/tag/v2.14.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.