CVE-2026-58251

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 62% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 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 with subscription deny permissions could bypass a plain subject deny rule by using a queue subscription, because queue-specific deny evaluation could override the plain subject deny result when the queue name itself was not denied. 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)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 13, 2026

Advisory Details (7)

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

Queue Subscribe Authz Bypass · 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-jx8g-9g95-6322
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 b9ffb63b85e7 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit b9ffb63b85e7 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164d
github_commit

commit 79c2f6e9ff87 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 79c2f6e9ff87 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1
github_commit

commit 013586288078 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit 013586288078 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65c

Vendor Advisories for CVE-2026-58251(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
nats-server2.10.1-1 ... 2.9.19-1 (14 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nats-server2.10.27-1, 2.12.4-1, 2.12.6-1, 2.14.1-1, 2.14.3-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nats-server2.10.27-1, 2.12.4-1, 2.12.6-12.14.1-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 74× 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.

Showing the most recent 100 of 125 total refreshes for this CVE.

  1. 2026-08-30 07:29 UTCEG score recompute
  2. 2026-08-30 07:29 UTCVendor advisory
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 21:49 UTCEG score recompute
  6. 2026-08-27 21:49 UTCVendor advisory
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-26 08:22 UTCEG score recompute
  10. 2026-08-26 08:22 UTCVendor advisory
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-24 20:44 UTCEG score recompute
  13. 2026-08-24 20:44 UTCVendor advisory
  14. 2026-08-23 21:47 UTCEG score recompute
  15. 2026-08-23 21:47 UTCVendor advisory
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-22 22:50 UTCVendor advisory
  18. 2026-08-21 23:52 UTCEG score recompute
  19. 2026-08-21 23:52 UTCVendor advisory
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 00:54 UTCEG score recompute
  22. 2026-08-21 00:54 UTCVendor advisory
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 01:58 UTCEG score recompute
  25. 2026-08-19 17:04 UTCEPSS rescore
Show 75 more
  1. 2026-08-18 20:44 UTCEG score recompute
  2. 2026-08-18 20:44 UTCVendor advisory
  3. 2026-08-18 13:48 UTCEPSS rescore
  4. 2026-08-17 14:41 UTCEG score recompute
  5. 2026-08-17 14:41 UTCVendor advisory
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-16 15:44 UTCEG score recompute
  8. 2026-08-16 15:44 UTCVendor advisory
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 16:47 UTCEG score recompute
  12. 2026-08-15 16:47 UTCVendor advisory
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 17:50 UTCEG score recompute
  15. 2026-08-14 17:50 UTCVendor advisory
  16. 2026-08-13 22:00 UTCEPSS rescore
  17. 2026-08-13 18:34 UTCVendor advisory
  18. 2026-08-12 19:37 UTCEG score recompute
  19. 2026-08-12 19:37 UTCVendor advisory
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-11 20:40 UTCEG score recompute
  22. 2026-08-11 20:40 UTCVendor advisory
  23. 2026-08-11 00:00 UTCEPSS rescore
  24. 2026-08-09 22:46 UTCEG score recompute
  25. 2026-08-09 22:46 UTCVendor advisory
  26. 2026-08-09 13:46 UTCEPSS rescore
  27. 2026-08-08 23:49 UTCEG score recompute
  28. 2026-08-08 23:49 UTCVendor advisory
  29. 2026-08-08 16:37 UTCEPSS rescore
  30. 2026-08-08 00:51 UTCEG score recompute
  31. 2026-08-07 01:54 UTCEG score recompute
  32. 2026-08-07 01:54 UTCVendor advisory
  33. 2026-08-06 13:47 UTCEPSS rescore
  34. 2026-08-06 02:57 UTCEG score recompute
  35. 2026-08-06 02:57 UTCVendor advisory
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 04:01 UTCEG score recompute
  38. 2026-08-05 04:01 UTCVendor advisory
  39. 2026-08-04 15:10 UTCEPSS rescore
  40. 2026-08-04 10:39 UTCEPSS rescore
  41. 2026-08-04 05:03 UTCEG score recompute
  42. 2026-08-04 05:03 UTCVendor advisory
  43. 2026-08-03 10:36 UTCEPSS rescore
  44. 2026-08-02 06:20 UTCEG score recompute
  45. 2026-08-02 06:20 UTCVendor advisory
  46. 2026-08-02 02:27 UTCEPSS rescore
  47. 2026-08-01 07:18 UTCEG score recompute
  48. 2026-08-01 07:18 UTCVendor advisory
  49. 2026-08-01 04:16 UTCEPSS rescore
  50. 2026-07-31 07:22 UTCEG score recompute
  51. 2026-07-31 07:22 UTCVendor advisory
  52. 2026-07-30 16:28 UTCEPSS rescore
  53. 2026-07-30 08:22 UTCEG score recompute
  54. 2026-07-30 08:22 UTCVendor advisory
  55. 2026-07-30 01:30 UTCEPSS rescore
  56. 2026-07-30 01:30 UTCEPSS rescore
  57. 2026-07-29 09:21 UTCEG score recompute
  58. 2026-07-29 09:21 UTCVendor advisory
  59. 2026-07-28 15:37 UTCEPSS rescore
  60. 2026-07-28 10:24 UTCEG score recompute
  61. 2026-07-28 10:24 UTCVendor advisory
  62. 2026-07-27 14:14 UTCEPSS rescore
  63. 2026-07-27 11:24 UTCEG score recompute
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 14:54 UTCEPSS rescore
  66. 2026-07-26 12:26 UTCEG score recompute
  67. 2026-07-26 12:26 UTCVendor advisory
  68. 2026-07-25 14:18 UTCEPSS rescore
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-24 14:18 UTCEPSS rescore
  71. 2026-07-24 14:18 UTCEPSS rescore
  72. 2026-07-23 14:18 UTCEPSS rescore
  73. 2026-07-23 14:18 UTCEPSS rescore
  74. 2026-07-23 03:20 UTCEG score recompute
  75. 2026-07-22 14:08 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58251?
CVE-2026-58251 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 with subscription deny permissions could bypass a plain subject deny rule by using a queue subscription, because queue-specific deny…
When was CVE-2026-58251 disclosed?
CVE-2026-58251 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-2026-58251 actively exploited?
CVE-2026-58251 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.8% of all scored CVEs.
What is the CVSS score of CVE-2026-58251?
CVE-2026-58251 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-58251?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58251, 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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