CVE-2026-58213

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 64% 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
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: 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 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.

CVSS v3
7.1
EG Score
7.1(medium)
EPSS
35.7%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 13, 2026

Advisory Details (8)

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

MQTT SUBSCRIBE Protocol Injection via Leaf Node/Route Forwarding allows arbitrary NATS command injection (CWE-74) · Advisory · nats-io/nats-server · GitHub

Affected: v2.14.1 and v2.12.9.

https://github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4f
github_release Patch Available

Release v2.14.1

Patch available: nats-io/nats-server v2.14.1

https://github.com/nats-io/nats-server/releases/tag/v2.14.1
github_release Patch Available

Release v2.12.9

Patch available: nats-io/nats-server v2.12.9

https://github.com/nats-io/nats-server/releases/tag/v2.12.9
github_pr

Cherry-picks for 2.12.9-RC.1

Fix merged in nats-io/nats-server PR #8164 on 2026-05-14 — awaiting tagged release

https://github.com/nats-io/nats-server/pull/8164
github_pr

Cherry-picks for 2.14.1-RC.1

Fix merged in nats-io/nats-server PR #8163 on 2026-05-14 — awaiting tagged release

https://github.com/nats-io/nats-server/pull/8163
github_commit

commit f14856b9e57a (nats-io/nats-server)

Fix landed in nats-io/nats-server commit f14856b9e57a — awaiting tagged release

https://github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9
github_commit

commit 64ebae40051e (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 64ebae40051e — awaiting tagged release

https://github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736
github_commit

commit 366837cfc65a (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 366837cfc65a — awaiting tagged release

https://github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 27× 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 22:47 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 09:40 UTCEG score recompute
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 20:35 UTCEG score recompute
  8. 2026-07-14 07:26 UTCEG score recompute
  9. 2026-07-13 22:31 UTCEPSS rescore
  10. 2026-07-13 18:20 UTCEG score recompute
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-13 05:12 UTCEG score recompute
  14. 2026-07-12 16:01 UTCEG score recompute
  15. 2026-07-12 05:46 UTCEPSS rescore
  16. 2026-07-12 02:55 UTCEG score recompute
  17. 2026-07-11 13:49 UTCEG score recompute
  18. 2026-07-11 08:27 UTCEPSS rescore
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 00:43 UTCEG score recompute
  21. 2026-07-10 11:36 UTCEG score recompute
  22. 2026-07-09 22:29 UTCEG score recompute
  23. 2026-07-09 19:10 UTCEPSS rescore
  24. 2026-07-09 19:10 UTCEPSS rescore
  25. 2026-07-09 09:22 UTCEG score recompute
Show 2 more
  1. 2026-07-08 20:16 UTCEG score recompute
  2. 2026-07-08 20:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58213?
CVE-2026-58213 is a high 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 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting…
When was CVE-2026-58213 disclosed?
CVE-2026-58213 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58213 actively exploited?
CVE-2026-58213 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58213?
CVE-2026-58213 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-58213?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58213, 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.

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