CVE-2026-33810

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — Patch released this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

A fix is available — apply it.

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

April 8, 2026

Last Modified

September 18, 2026

Advisory Details (6)

Auto-updated Jun 8, 2026
No patch confirmed yet.
generic

oss-security - Re: Go 1.26.2 and Go 1.25.9 are released with 10 security fixes

http://www.openwall.com/lists/oss-security/2026/04/20/1
generic

oss-security - Re: Go 1.26.2 and Go 1.25.9 are released with 10 security fixes

http://www.openwall.com/lists/oss-security/2026/04/19/4
generic

GO-2026-4866 - Go Packages

https://pkg.go.dev/vuln/GO-2026-4866
generic
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
generic

crypto/x509: excluded DNS constraints not properly applied to wildcard domains · Issue #78332 · golang/go · GitHub

https://go.dev/issue/78332
generic
https://go.dev/cl/763763

Vendor Advisories for CVE-2026-33810(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatosbuild-composer-0:75-10.el8_82026-09-17redhat
redhatflightctl-0:1.1.4-1.el9em2026-09-16redhat
redhatgrafana-0:10.2.6-23.el9_62026-09-15redhat
redhatgrafana-0:10.2.6-26.el10_02026-09-15redhat
redhatgit-lfs-0:3.6.1-2.el10_0.72026-09-14redhat
redhatyggdrasil-0:0.4.7-6.el10_02026-09-14redhat
redhatgrafana-pcp-0:5.1.1-5.el9_2.22026-09-14redhat
redhatgrafana-pcp-0:5.1.1-9.el9_42026-09-14redhat
redhatosbuild-composer-0:134.1-12.el10_02026-09-10redhat
redhatignition-0:2.17.0-2.el9_4.22026-09-09redhat
redhatosbuild-composer-0:165.1-3.el10_2.22026-09-09redhat
redhatignition-0:2.15.0-2.el9_2.12026-09-08redhat
redhatrhoai/odh-model-registry-job-async-upload-rhel9:17882325482026-09-08redhat
redhatimage-builder-0:52.1-1.el10_2.22026-09-08redhat
redhatbuildah-2:1.43.1-5.el10_22026-09-04redhat
redhatgo-fdo-server-0:1.0.1-2.el10_2.42026-09-02redhat
redhatgo-fdo-client-0:1.0.0-4.el10_2.72026-09-02redhat
redhatrunc-4:1.2.9-1.el9_4.22026-09-01redhat
redhatgolang-0:1.26.5-1.el9_22026-08-31redhat
redhatrhc-1:0.3.2-6.el10_02026-08-31redhat
redhatignition-0:2.21.0-2.el10_0.32026-08-25redhat
redhatgolang-0:1.26.5-1.el9_42026-08-20redhat
redhatyggdrasil-0:0.4.9.2-1.el10_2.22026-08-19redhat
redhatgrafana-pcp-0:5.3.0-1.el10_02026-08-18redhat
redhatgrafana-pcp-0:5.1.1-15.el9_62026-08-18redhat
redhatetcd-0:3.3.23-22.el8ost2026-08-13redhat
redhatoadp/oadp-velero-rhel9:17851808782026-08-06redhat
redhatcontainer-tools:rhel8-8060020260803064027.ad008a3a2026-08-06redhat
redhatgolang-0:1.26.5-1.el9_62026-08-03redhat
redhatgolang-0:1.26.5-1.el10_02026-08-03redhat

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

(2 across 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
golang-1.261.26.0-1, 1.26.1-1, 1.26~rc2-1, 1.26~rc3-1, 1.26~rc3-21.26.2-1—
Go(1)
PackageVulnerable rangeFixed inDependents
stdlib—1.26.2—

Weakness Classification(2)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 33× in last 7d / 121× 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 387 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-33810?
CVE-2026-33810 is a high vulnerability published on April 8, 2026. When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the…
When was CVE-2026-33810 disclosed?
CVE-2026-33810 was first published in the National Vulnerability Database on April 8, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33810 actively exploited?
CVE-2026-33810 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 72.4% of all scored CVEs.
What is the CVSS score of CVE-2026-33810?
CVE-2026-33810 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-33810?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33810, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-33810

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