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
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)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity80% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
17.7%
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 8× in last 7d / 62× 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 170 total refreshes for this CVE.

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

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 17.7% 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

Explore the affected products and dependency analysis for CVE-2026-3012

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