CVE-2026-33190

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports (DoT, DoH, DoH3, DoQ, and gRPC) because it trusts the transport writer's TsigStatus() instead of performing verification itself. The DoH and DoH3 writer's TsigStatus() always returns nil, the DoT server does not set TsigSecret on the dns.Server, and the DoQ and gRPC writers also unconditionally return nil. This allows an unauthenticated remote client to bypass TSIG-based authentication and access resources intended to be restricted behind a tsig require all policy. Plain DNS over TCP and UDP are not affected. This issue has been fixed in version 1.14.3.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

Published

May 5, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated May 5, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

TSIG authentication bypass on DoT, DoH, DoH3, DoQ, and gRPC · Advisory · coredns/coredns · GitHub

https://github.com/coredns/coredns/security/advisories/GHSA-qhmp-q7xh-99rh
generic

Release v1.14.3 · coredns/coredns · GitHub

https://github.com/coredns/coredns/releases/tag/v1.14.3

Vendor Advisories for CVE-2026-33190(1)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/coredns/coredns—
  • every version up to 1.14.3: fixed in 1.14.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 26× 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 232 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-33190?
CVE-2026-33190 is a high vulnerability published on May 5, 2026. CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports (DoT, DoH, DoH3, DoQ, and gRPC) because it trusts the transport writer's TsigStatus() instead of performing verification itself. The DoH and DoH3 writer's…
When was CVE-2026-33190 disclosed?
CVE-2026-33190 was first published on May 5, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33190 actively exploited?
CVE-2026-33190 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33190?
CVE-2026-33190 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-33190?
A fix for CVE-2026-33190 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-33190 are linked in the Vendor Advisories panel on this page.

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