CVE-2026-86731

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-08. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireAdmin() when the targeted user is an administrator, unlike the mirror action actionDeactivateUser. As a result, an authenticated control panel user who is not an administrator but holds the administrateUsers permission can activate a pending or deliberately deactivated administrator account, which can lead to permission escalation when combined with resetting that account's password. The issue is fixed in Craft CMS 5.10.12.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 19, 2026

Advisory Details (2)

Auto-updated Sep 8, 2026
Patch available. Sources: github.
generic

Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController | Advisories | VulnCheck

https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.12-permission-escalation-via-userscontroller
github Patch Available

Missing admin-target guard in UsersController::actionActivateUser can lead to permission escalation · Advisory · craftcms/cms · GitHub

https://github.com/craftcms/cms/security/advisories/GHSA-jqf5-vfg6-8cx5

Vendor Advisories for CVE-2026-86731(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 55× 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.

  1. 2026-09-25 04:43 UTCEG score recompute
  2. 2026-09-25 04:43 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 06:31 UTCEG score recompute
  5. 2026-09-24 06:31 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 08:19 UTCEG score recompute
  8. 2026-09-23 08:19 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 10:07 UTCEG score recompute
  11. 2026-09-22 10:07 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 11:54 UTCEG score recompute
  14. 2026-09-21 11:54 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 13:42 UTCEG score recompute
  17. 2026-09-20 13:42 UTCGHSA enrichment
  18. 2026-09-19 15:30 UTCEG score recompute
  19. 2026-09-19 15:30 UTCGHSA enrichment
  20. 2026-09-19 14:31 UTCEG score recompute
  21. 2026-09-19 14:31 UTCGHSA enrichment
  22. 2026-09-19 00:25 UTCEG score recompute
  23. 2026-09-19 00:25 UTCGHSA enrichment
  24. 2026-09-18 19:28 UTCEPSS rescore
  25. 2026-09-18 02:14 UTCEG score recompute
Show 30 more
  1. 2026-09-18 02:14 UTCGHSA enrichment
  2. 2026-09-17 19:32 UTCEPSS rescore
  3. 2026-09-17 04:02 UTCEG score recompute
  4. 2026-09-17 04:02 UTCGHSA enrichment
  5. 2026-09-16 14:09 UTCEPSS rescore
  6. 2026-09-16 05:49 UTCEG score recompute
  7. 2026-09-16 05:49 UTCGHSA enrichment
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 07:38 UTCEG score recompute
  10. 2026-09-15 07:38 UTCGHSA enrichment
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 09:26 UTCEG score recompute
  14. 2026-09-14 09:26 UTCGHSA enrichment
  15. 2026-09-13 11:14 UTCEG score recompute
  16. 2026-09-13 11:14 UTCGHSA enrichment
  17. 2026-09-12 13:02 UTCEG score recompute
  18. 2026-09-12 13:02 UTCGHSA enrichment
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 14:50 UTCEG score recompute
  22. 2026-09-11 14:50 UTCGHSA enrichment
  23. 2026-09-10 16:36 UTCEG score recompute
  24. 2026-09-10 16:36 UTCGHSA enrichment
  25. 2026-09-09 18:24 UTCGHSA enrichment
  26. 2026-09-08 20:11 UTCEG score recompute
  27. 2026-09-08 20:11 UTCGHSA enrichment
  28. 2026-09-08 16:41 UTCEG score recompute
  29. 2026-09-08 15:25 UTCEG score recompute
  30. 2026-09-08 15:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86731?
CVE-2026-86731 is a medium vulnerability published on September 8, 2026. Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireAdmin() when the targeted user is an administrator, unlike the…
When was CVE-2026-86731 disclosed?
CVE-2026-86731 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86731 actively exploited?
CVE-2026-86731 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 78.7% of all scored CVEs.
What is the CVSS score of CVE-2026-86731?
CVE-2026-86731 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-86731?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86731, 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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