CVE-2026-58207

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 57% 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, nvd
Trending — 4 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: 1%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 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal arithmetic before the response window was safely bounded. This issue is fixed in versions 2.14.3 and 2.12.12.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
42.8%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (5)

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

Release v2.14.3

Patch available: nats-io/nats-server v2.14.3

https://github.com/nats-io/nats-server/releases/tag/v2.14.3
github_release Patch Available

Release v2.12.12

Patch available: nats-io/nats-server v2.12.12

https://github.com/nats-io/nats-server/releases/tag/v2.12.12
github_commit

commit 894d94119276 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 894d94119276 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3
github_commit

commit 2ae047139e37 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 2ae047139e37 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9
github Patch Available

Remote crash via integer overflow in Connz pagination · Advisory · nats-io/nats-server · GitHub

Affected: v2.14.3 and v2.12.12.

https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2

Vendor Advisories for CVE-2026-58207(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 22× in last 7d / 24× 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. 2026-07-15 19:03 UTCEG score recompute
  2. 2026-07-15 19:03 UTCVendor advisory
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 19:38 UTCEG score recompute
  8. 2026-07-13 22:31 UTCEPSS rescore
  9. 2026-07-13 20:11 UTCEG score recompute
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-12 20:46 UTCEG score recompute
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-11 21:17 UTCEG score recompute
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-11 08:27 UTCEPSS rescore
  17. 2026-07-10 21:52 UTCEG score recompute
  18. 2026-07-09 22:27 UTCEG score recompute▼ 1.20
  19. 2026-07-09 19:36 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  20. 2026-07-09 19:10 UTCEPSS rescore
  21. 2026-07-09 19:10 UTCEPSS rescore
  22. 2026-07-09 09:36 UTCEG score recompute
  23. 2026-07-08 20:45 UTCEG score recompute
  24. 2026-07-08 20:44 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58207?
CVE-2026-58207 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 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal…
When was CVE-2026-58207 disclosed?
CVE-2026-58207 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-2026-58207 actively exploited?
CVE-2026-58207 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58207?
CVE-2026-58207 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-58207?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58207, 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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