CVE-2026-88959

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-10. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

Anchor CMS through 0.12.7 fails to enforce role-based access control in admin user-management endpoints, allowing any authenticated low-privilege user to create administrator accounts or modify existing ones. Attackers with editor or user roles can POST directly to admin/users/add or admin/users/edit endpoints to create new administrator accounts or change the existing administrator's password, gaining full administrative access.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 11, 2026

Advisory Details (4)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

Anchor CMS through 0.12.7 Privilege Escalation via Missing Authorization on Admin User-Management Endpoints | Advisories | VulnCheck

https://www.vulncheck.com/advisories/anchor-cms-through-0.12.7-privilege-escalation-via-missing-authorization-on-admin-user-management-endpoints
generic

GitHub - anchorcms/anchor-cms: A lightweight blog CMS for PHP · GitHub

https://github.com/anchorcms/anchor-cms
generic

anchor-cms/anchor/routes/users.php at 0.12.7 · anchorcms/anchor-cms · GitHub

https://github.com/anchorcms/anchor-cms/blob/0.12.7/anchor/routes/users.php
generic

Anchor CMS 0.12.7 - Missing Authorization / Privilege Escalation · GitHub

https://gist.github.com/bozorovab2009-spec/57931237f774b78333f8fe47e84ec4aa

Vendor Advisories for CVE-2026-88959(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 25× in last 7d / 41× 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. 2026-09-19 18:28 UTCEG score recompute
  2. 2026-09-19 18:28 UTCGHSA enrichment
  3. 2026-09-19 05:52 UTCEG score recompute
  4. 2026-09-19 05:52 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 17:16 UTCGHSA enrichment
  7. 2026-09-18 04:40 UTCEG score recompute
  8. 2026-09-18 04:40 UTCGHSA enrichment
  9. 2026-09-17 19:32 UTCEPSS rescore
  10. 2026-09-17 16:04 UTCGHSA enrichment
  11. 2026-09-17 03:28 UTCGHSA enrichment
  12. 2026-09-16 14:52 UTCEG score recompute
  13. 2026-09-16 14:52 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 02:11 UTCGHSA enrichment
  17. 2026-09-15 13:35 UTCEG score recompute
  18. 2026-09-15 13:35 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 00:59 UTCGHSA enrichment
  21. 2026-09-14 12:23 UTCGHSA enrichment
  22. 2026-09-13 23:47 UTCEG score recompute
  23. 2026-09-13 23:47 UTCGHSA enrichment
  24. 2026-09-13 16:48 UTCEPSS rescore
  25. 2026-09-13 11:11 UTCGHSA enrichment
Show 16 more
  1. 2026-09-12 22:35 UTCEG score recompute
  2. 2026-09-12 22:35 UTCGHSA enrichment
  3. 2026-09-12 15:02 UTCEPSS rescore
  4. 2026-09-12 09:59 UTCGHSA enrichment
  5. 2026-09-11 21:23 UTCEG score recompute
  6. 2026-09-11 21:23 UTCGHSA enrichment
  7. 2026-09-11 20:47 UTCEG score recompute
  8. 2026-09-11 20:47 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 08:39 UTCGHSA enrichment
  12. 2026-09-10 20:03 UTCEG score recompute
  13. 2026-09-10 20:03 UTCGHSA enrichment
  14. 2026-09-10 16:20 UTCEG score recompute
  15. 2026-09-10 15:45 UTCEG score recompute
  16. 2026-09-10 15:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88959?
CVE-2026-88959 is a high vulnerability published on September 10, 2026. Anchor CMS through 0.12.7 fails to enforce role-based access control in admin user-management endpoints, allowing any authenticated low-privilege user to create administrator accounts or modify existing ones. Attackers with editor or user roles can POST directly to admin/users/add or…
When was CVE-2026-88959 disclosed?
CVE-2026-88959 was first published in the National Vulnerability Database on September 10, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88959 actively exploited?
CVE-2026-88959 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 78.2% of all scored CVEs.
What is the CVSS score of CVE-2026-88959?
CVE-2026-88959 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-88959?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88959, 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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