CVE-2026-29785

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 51% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.14 and 2.12.5, if the nats-server has the "leafnode" configuration enabled (not default), then anyone who can connect can crash the nats-server by triggering a panic. This happens pre-authentication and requires that compression be enabled (which it is, by default, when leafnodes are used). Versions 2.11.14 and 2.12.5 contain a fix. As a workaround, disable compression on the leafnode port.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

March 25, 2026

Last Modified

September 9, 2026

Advisory Details (9)

Auto-updated Jul 3, 2026
Patch available. Sources: github_commit, github, redhat.
redhat Patch Available
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29785.json
redhat

2451444 – (CVE-2026-29785) CVE-2026-29785 github.com/nats-io/nats-server: NATS-Server: Denial of Service via leafnode compression

https://bugzilla.redhat.com/show_bug.cgi?id=2451444
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-29785
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:23345
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:22347
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:21769
github Patch Available

leafnode pre-auth server panic DoS · Advisory · nats-io/nats-server · GitHub

https://github.com/nats-io/nats-server/security/advisories/GHSA-52jh-2xxh-pwh6
github_commit

commit a1488de6f2ba (nats-io/nats-server)

Fix landed in nats-io/nats-server commit a1488de6f2ba — awaiting tagged release

https://github.com/nats-io/nats-server/commit/a1488de6f2ba6e666aef0f9cce0016f7f167d6a8
generic
https://advisories.nats.io/CVE/secnote-2026-04.txt

Vendor Advisories for CVE-2026-29785(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatmulticluster-globalhub/multicluster-globalhub-grafana-rhel9:17801671182026-06-04redhat
redhatmulticluster-globalhub/multicluster-globalhub-grafana-rhel9:17795794392026-06-01redhat
redhatmulticluster-globalhub/multicluster-globalhub-grafana-rhel9:17788677532026-05-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/nats-io/nats-server———
github.com/nats-io/nats-server/v2—2.12.5—
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, 2.12.4-12.12.6-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 39× 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 152 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-29785?
CVE-2026-29785 is a high vulnerability published on March 25, 2026. NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.14 and 2.12.5, if the nats-server has the "leafnode" configuration enabled (not default), then anyone who can connect can crash the nats-server by triggering a panic. This happens…
When was CVE-2026-29785 disclosed?
CVE-2026-29785 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29785 actively exploited?
CVE-2026-29785 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.0% of all scored CVEs.
What is the CVSS score of CVE-2026-29785?
CVE-2026-29785 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-29785?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29785, 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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