CVE-2026-58252

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
6.5
EG Score
6.5(medium)
EPSS
37.1%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (7)

Auto-updated Jul 8, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Subscribe Authz Bypass via Wildcard-Overlap · Advisory · nats-io/nats-server · GitHub

Affected: v2.14.0, v2.12.7 and v2.11.16.

https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr
github_release Patch Available

Release v2.14.0

Patch available: nats-io/nats-server v2.14.0

https://github.com/nats-io/nats-server/releases/tag/v2.14.0
github_release Patch Available

Release v2.12.7

Patch available: nats-io/nats-server v2.12.7

https://github.com/nats-io/nats-server/releases/tag/v2.12.7
github_release Patch Available

Release v2.11.16

Patch available: nats-io/nats-server v2.11.16

https://github.com/nats-io/nats-server/releases/tag/v2.11.16
github_commit

commit e611ca960469 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit e611ca960469 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6
github_commit

commit a42a6d1e258e (nats-io/nats-server)

Fix landed in nats-io/nats-server commit a42a6d1e258e — awaiting tagged release

https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854
github_commit

commit 8ced85a11497 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 8ced85a11497 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b

Vendor Advisories for CVE-2026-58252(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 13:48 UTCEG score recompute
  2. 2026-07-12 05:46 UTCEPSS rescore
  3. 2026-07-11 15:24 UTCEG score recompute
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-10 17:02 UTCEG score recompute
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 18:38 UTCEG score recompute
  10. 2026-07-08 20:16 UTCEG score recompute
  11. 2026-07-08 20:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58252?
CVE-2026-58252 is a medium vulnerability published on July 8, 2026. 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…
When was CVE-2026-58252 disclosed?
CVE-2026-58252 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58252 actively exploited?
CVE-2026-58252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58252?
CVE-2026-58252 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-58252?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58252, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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