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 — 4 sources updated 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
27%
KEV
Not listed

Published

April 8, 2026

Last Modified

July 24, 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
redhatweb-terminal/web-terminal-exec-rhel9:17842476102026-07-20redhat
redhatweb-terminal/web-terminal-exec-rhel9:17842960332026-07-20redhat
redhatweb-terminal/web-terminal-exec-rhel9:17842961272026-07-20redhat
redhatweb-terminal/web-terminal-exec-rhel9:17842962032026-07-20redhat
redhatrhmtc/openshift-migration-registry-rhel8:17839142762026-07-20redhat
redhatweb-terminal/web-terminal-exec-rhel9:17842961142026-07-20redhat
redhatrhem/flightctl-ui-rhel10:17841945742026-07-16redhat
redhatrhem/flightctl-ui-rhel9:17841277362026-07-15redhat
redhatgolang-github-openstack-k8s-operators-os-diff-0:0.1.1-18.0.20260602234716.a95ae05.el9ost2026-07-15redhat
redhatrhem/flightctl-ui-rhel9:17835024382026-07-08redhat
redhatflightctl-0:1.0.3-1.el9em2026-07-08redhat
redhatyggdrasil-worker-forwarder-0:0.0.3-5.el9sat2026-07-01redhat
redhatoadp/oadp-velero-rhel9:17798095982026-06-25redhat
redhatetcd-0:3.4.26-9.5.el9ost2026-06-22redhat
redhatcompliance/openshift-compliance-operator-bundle:17816050052026-06-17redhat
redhatopenshift-logging/eventrouter-rhel9:17811928912026-06-17redhat
redhatoadp/oadp-velero-rhel9:17798080272026-06-17redhat
redhathawtio-operator-container2026-06-10redhat
redhatrhtas/client-server-rhel9:17803995822026-06-08redhat
redhatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:17803208092026-06-04redhat
redhatweb-terminal/web-terminal-exec-rhel9:17804250802026-06-03redhat
redhatweb-terminal/web-terminal-exec-rhel9:17804249282026-06-03redhat
redhatweb-terminal/web-terminal-exec-rhel9:17804248292026-06-03redhat
redhatopenshift-logging/eventrouter-rhel9:17800516402026-06-03redhat
redhatweb-terminal/web-terminal-exec-rhel9:17804250772026-06-03redhat
redhatweb-terminal/web-terminal-exec-rhel9:17804233392026-06-03redhat
redhatrh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:1.0.3-17799961972026-06-02redhat
redhatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:17798388192026-06-01redhat
redhatdevspaces/udi-rhel9:17798297362026-05-28redhat
redhatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:17798286912026-05-28redhat

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

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
stdlib—1.26.2—

Weakness Classification(2)

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

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 15× in last 7d / 57× 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 136 total refreshes for this CVE.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 08:56 UTCEG score recompute
  4. 2026-07-26 08:56 UTCVendor advisory
  5. 2026-07-26 08:56 UTCGHSA enrichment
  6. 2026-07-25 14:18 UTCEPSS rescore
  7. 2026-07-25 14:18 UTCEPSS rescore
  8. 2026-07-24 14:17 UTCEPSS rescore
  9. 2026-07-24 14:17 UTCEPSS rescore
  10. 2026-07-23 14:18 UTCEPSS rescore
  11. 2026-07-23 14:18 UTCEPSS rescore
  12. 2026-07-23 03:09 UTCEG score recompute▲ 0.70
  13. 2026-07-22 14:08 UTCEPSS rescore
  14. 2026-07-21 15:24 UTCEPSS rescore
  15. 2026-07-20 17:08 UTCEPSS rescore
  16. 2026-07-19 14:31 UTCEPSS rescore
  17. 2026-07-19 02:29 UTCEPSS rescore
  18. 2026-07-18 10:04 UTCEPSS rescore
  19. 2026-07-17 01:24 UTCOSV refresh
  20. 2026-07-16 17:03 UTCEPSS rescore
  21. 2026-07-16 12:29 UTCNVD updateCVSS v3 → 8.2
  22. 2026-07-16 12:08 UTCMITRE cvelistV5CVSS v3 → 7.5
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 16:57 UTCEPSS rescore
  25. 2026-07-15 14:22 UTCNVD updateCVSS v3 → 8.2
Show 75 more
  1. 2026-07-15 14:09 UTCMITRE cvelistV5CVSS v3 → 7.5
  2. 2026-07-15 12:22 UTCNVD updateCVSS v3 → 8.2
  3. 2026-07-15 03:14 UTCMITRE cvelistV5CVSS v3 → 7.5
  4. 2026-07-15 02:23 UTCNVD updateCVSS v3 → 8.2
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-13 22:30 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-10 12:12 UTCMITRE cvelistV5CVSS v3 → 7.5
  12. 2026-07-09 19:10 UTCEPSS rescore
  13. 2026-07-09 13:52 UTCNVD updateCVSS v3 → 8.2
  14. 2026-07-08 15:15 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-07 12:11 UTCMITRE cvelistV5CVSS v3 → 7.5
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 13:51 UTCNVD updateCVSS v3 → 8.2
  20. 2026-07-06 13:07 UTCMITRE cvelistV5CVSS v3 → 7.5
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-06 02:23 UTCEPSS rescore
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-01 15:06 UTCEPSS rescore
  26. 2026-06-30 23:22 UTCEPSS rescore
  27. 2026-06-29 14:06 UTCEPSS rescore
  28. 2026-06-29 14:06 UTCEPSS rescore
  29. 2026-06-28 14:07 UTCEPSS rescore
  30. 2026-06-28 14:07 UTCEPSS rescore
  31. 2026-06-28 04:56 UTCEPSS rescore
  32. 2026-06-28 04:56 UTCEPSS rescore
  33. 2026-06-27 03:08 UTCEPSS rescore
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-24 14:05 UTCEPSS rescore
  37. 2026-06-23 21:33 UTCEPSS rescore
  38. 2026-06-23 21:33 UTCEPSS rescore
  39. 2026-06-22 14:25 UTCEPSS rescore
  40. 2026-06-22 14:25 UTCEPSS rescore
  41. 2026-06-21 14:56 UTCEPSS rescore
  42. 2026-06-21 14:56 UTCEPSS rescore
  43. 2026-06-21 01:59 UTCEPSS rescore
  44. 2026-06-19 19:25 UTCEPSS rescore
  45. 2026-06-19 19:25 UTCEPSS rescore
  46. 2026-06-18 17:52 UTCEPSS rescore
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-17 17:53 UTCEPSS rescore
  49. 2026-06-16 17:52 UTCEPSS rescore
  50. 2026-06-15 17:49 UTCEPSS rescore
  51. 2026-06-14 23:18 UTCEPSS rescore
  52. 2026-06-13 23:00 UTCEPSS rescore
  53. 2026-06-12 23:12 UTCEPSS rescore
  54. 2026-06-12 23:12 UTCEPSS rescore
  55. 2026-06-11 21:14 UTCVendor advisory
  56. 2026-06-11 21:14 UTCGHSA enrichment
  57. 2026-06-11 14:00 UTCEPSS rescore
  58. 2026-06-10 22:18 UTCEPSS rescore
  59. 2026-06-10 13:22 UTCEPSS rescore
  60. 2026-06-10 12:45 UTCVendor advisory
  61. 2026-06-10 12:45 UTCGHSA enrichment
  62. 2026-06-10 01:08 UTCVendor advisory
  63. 2026-06-10 01:08 UTCGHSA enrichment
  64. 2026-06-09 13:42 UTCVendor advisory
  65. 2026-06-09 13:42 UTCGHSA enrichment
  66. 2026-06-08 14:17 UTCEPSS rescore
  67. 2026-06-08 14:17 UTCEPSS rescore
  68. 2026-06-08 08:45 UTCVendor advisory
  69. 2026-06-08 08:45 UTCGHSA enrichment
  70. 2026-06-07 21:25 UTCVendor advisory
  71. 2026-06-07 21:25 UTCGHSA enrichment
  72. 2026-06-07 15:25 UTCEPSS rescore
  73. 2026-06-07 15:25 UTCEPSS rescore
  74. 2026-06-07 15:25 UTCEPSS rescore
  75. 2026-06-07 10:04 UTCVendor advisory

Related CVEs(same vendor + same CWE)

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 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-2026-33810 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 73.5% 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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