CVE-2026-3012

MEDIUMNVD 6.88.0▲
EchelonGraph scoreMEDIUM confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. NVD baseline CVSS 6.8; sources differ by 1.2.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.8Exploit: NoneExposed: 0

A fix is available — apply it.

A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.

CVSS v3
6.8
EG Score
8.0(medium)
EPSS
17.6%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jun 3, 2026
Patch available. Sources: redhat.
generic

16003 – (CVE-2026-3012) [SECURITY] CVE-2026-3012 group policy certificate enrollment uses http:// without validation

https://bugzilla.samba.org/show_bug.cgi?id=16003
redhat Patch Available

2447319 – (CVE-2026-3012) CVE-2026-3012 samba: group policy certificate enrollment uses http:// without validation

Affected: Red Hat Enterprise Linux 8

https://bugzilla.redhat.com/show_bug.cgi?id=2447319
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-3012
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:22644

Vendor Advisories for CVE-2026-3012(11)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwinbind (2:4.23.6+dfsg-1ubuntu2.1) @ resolute2026-07-09ubuntu
redhatrhcos-4.19.9.6.202606241344-02026-07-02redhat
redhatsamba-0:4.19.4-105.el9_4.42026-06-23redhat
redhatsamba-0:4.15.5-16.el8_6.12026-06-23redhat
redhatsamba-0:4.17.5-105.el9_2.52026-06-23redhat
redhatsamba-0:4.17.5-7.el8_8.12026-06-23redhat
redhatsamba-0:4.21.3-114.el10_0.12026-06-23redhat
redhatsamba-0:4.21.3-14.el9_6.12026-06-15redhat
redhatsamba-0:4.23.5-10.el9_82026-06-10redhat
redhatsamba-0:4.23.5-109.el10_22026-06-03redhat
redhatsamba-0:4.19.4-16.el8_102026-06-03redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 11× in last 7d / 90× 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 206 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 02:25 UTCNVD updateCVSS v3 → 6.8 · severity → MEDIUM
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 8 · severity → HIGH
  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. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-09 00:29 UTCEG score recompute
  13. 2026-07-09 00:29 UTCVendor advisory
  14. 2026-07-09 00:29 UTCGHSA enrichment
  15. 2026-07-08 15:15 UTCEPSS rescore
  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-01 15:06 UTCEPSS rescore
  24. 2026-07-01 11:39 UTCEG score recompute
  25. 2026-07-01 11:39 UTCVendor advisory
Show 75 more
  1. 2026-07-01 11:39 UTCGHSA enrichment
  2. 2026-06-30 23:22 UTCEPSS rescore
  3. 2026-06-30 05:53 UTCEG score recompute
  4. 2026-06-30 05:53 UTCVendor advisory
  5. 2026-06-30 05:53 UTCGHSA enrichment
  6. 2026-06-29 14:35 UTCEG score recompute
  7. 2026-06-29 14:35 UTCVendor advisory
  8. 2026-06-29 14:35 UTCGHSA enrichment
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-28 21:26 UTCEG score recompute
  11. 2026-06-28 21:26 UTCVendor advisory
  12. 2026-06-28 21:26 UTCGHSA enrichment
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 07:47 UTCEG score recompute
  15. 2026-06-28 07:47 UTCVendor advisory
  16. 2026-06-28 07:47 UTCGHSA enrichment
  17. 2026-06-28 04:56 UTCEPSS rescore
  18. 2026-06-27 19:13 UTCEG score recompute
  19. 2026-06-27 19:13 UTCVendor advisory
  20. 2026-06-27 19:13 UTCGHSA enrichment
  21. 2026-06-27 06:38 UTCEG score recompute
  22. 2026-06-27 06:38 UTCVendor advisory
  23. 2026-06-27 06:38 UTCGHSA enrichment
  24. 2026-06-27 03:08 UTCEPSS rescore
  25. 2026-06-26 17:13 UTCEG score recompute
  26. 2026-06-26 17:13 UTCVendor advisory
  27. 2026-06-26 17:13 UTCGHSA enrichment
  28. 2026-06-26 03:09 UTCEG score recompute
  29. 2026-06-26 03:09 UTCVendor advisory
  30. 2026-06-26 03:09 UTCGHSA enrichment
  31. 2026-06-25 14:34 UTCEG score recompute
  32. 2026-06-25 14:34 UTCVendor advisory
  33. 2026-06-25 14:34 UTCGHSA enrichment
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-25 01:58 UTCEG score recompute
  37. 2026-06-25 01:58 UTCVendor advisory
  38. 2026-06-25 01:58 UTCGHSA enrichment
  39. 2026-06-24 14:05 UTCEPSS rescore
  40. 2026-06-23 21:33 UTCEPSS rescore
  41. 2026-06-23 09:33 UTCNVD updateCVSS v3 → 6.8 · severity → MEDIUM
  42. 2026-06-23 08:05 UTCMITRE cvelistV5CVSS v3 → 8 · severity → HIGH
  43. 2026-06-23 05:34 UTCNVD updateCVSS v3 → 6.8 · severity → MEDIUM
  44. 2026-06-23 03:50 UTCMITRE cvelistV5CVSS v3 → 8 · severity → HIGH
  45. 2026-06-23 03:31 UTCNVD updateCVSS v3 → 6.8 · severity → MEDIUM
  46. 2026-06-22 23:50 UTCMITRE cvelistV5CVSS v3 → 8 · severity → HIGH
  47. 2026-06-22 14:25 UTCEPSS rescore
  48. 2026-06-22 14:25 UTCEPSS rescore
  49. 2026-06-21 14:56 UTCEPSS rescore
  50. 2026-06-21 14:56 UTCEPSS rescore
  51. 2026-06-21 01:59 UTCEPSS rescore
  52. 2026-06-19 19:25 UTCEPSS rescore
  53. 2026-06-18 17:52 UTCEPSS rescore
  54. 2026-06-18 17:52 UTCEPSS rescore
  55. 2026-06-17 18:59 UTCEG score recompute
  56. 2026-06-17 18:59 UTCVendor advisory
  57. 2026-06-17 18:58 UTCGHSA enrichment
  58. 2026-06-17 17:53 UTCEPSS rescore
  59. 2026-06-17 04:51 UTCEG score recompute
  60. 2026-06-17 04:51 UTCVendor advisory
  61. 2026-06-17 04:50 UTCGHSA enrichment
  62. 2026-06-16 17:52 UTCEPSS rescore
  63. 2026-06-16 16:13 UTCEG score recompute
  64. 2026-06-16 16:13 UTCVendor advisory
  65. 2026-06-16 16:12 UTCGHSA enrichment
  66. 2026-06-16 02:10 UTCEG score recompute
  67. 2026-06-16 02:10 UTCVendor advisory
  68. 2026-06-16 02:10 UTCGHSA enrichment
  69. 2026-06-15 17:49 UTCEPSS rescore
  70. 2026-06-15 13:35 UTCEG score recompute
  71. 2026-06-15 13:35 UTCVendor advisory
  72. 2026-06-15 13:35 UTCGHSA enrichment
  73. 2026-06-14 23:18 UTCEPSS rescore
  74. 2026-06-14 21:57 UTCEG score recompute
  75. 2026-06-14 21:57 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-3012?
CVE-2026-3012 is a medium vulnerability published on May 27, 2026. A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to…
When was CVE-2026-3012 disclosed?
CVE-2026-3012 was first published in the National Vulnerability Database on May 27, 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-2026-3012 actively exploited?
CVE-2026-3012 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-3012?
CVE-2026-3012 has a CVSS v3 base score of 6.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.0.
How do I remediate CVE-2026-3012?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3012, 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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