CVE-2026-33810

HIGHNVD 8.27.5▼
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-08. NVD baseline CVSS 8.2; sources differ by 0.7.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.2Exploit: NoneExposed: 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
7.5(medium)
EPSS
26.2%
KEV
Not listed

Published

April 8, 2026

Last Modified

July 15, 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(26)

Vendor / EcosystemFixed in / PatchReleasedSource
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-rhel9:17804248292026-06-03redhat
redhatweb-terminal/web-terminal-exec-rhel9:17804249282026-06-03redhat
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
redhatweb-terminal/web-terminal-exec-rhel9:17804250802026-06-03redhat
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
redhatopentelemetry-collector-0:0.144.0-2.el9_62026-05-20redhat
redhatopentelemetry-collector-0:0.144.0-2.el9_42026-05-20redhat
redhatopentelemetry-collector-0:0.144.0-2.el10_02026-05-20redhat
redhatopentelemetry-collector-0:0.144.0-2.el10_22026-05-19redhat
redhatopentelemetry-collector-0:0.144.0-2.el9_82026-05-19redhat
redhatgolang-github-openprinting-ipp-usb-0:0.9.27-7.el10_22026-05-19redhat
redhatcryostat/cryostat-storage-rhel9:4.1.1-72026-05-06redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17779866302026-05-05redhat
redhatansible-automation-platform-26/receptor-rhel9:17773915422026-05-04redhat
redhatopenshift-builds/openshift-builds-waiters-rhel9:17768476662026-04-28redhat
redhatopenshift-builds/openshift-builds-waiters-rhel9:17768469362026-04-28redhat
redhatrhosdt/tempo-rhel9:17764356802026-04-21redhat
redhatgolang1-26-main-1.26.2-1.hum12026-04-09redhat

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

(17)

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 16× in last 7d / 52× 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 121 total refreshes for this CVE.

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

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 15, 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 26.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33810?
CVE-2026-33810 has a CVSS v3 base score of 8.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.
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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