CVE-2026-81907

HIGHNVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory published 2026-09-11. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery (CSRF) in the Express "Clear Entries" function (POST /index.php/dashboard/system/express/entities/delete_entries) because the controller records but does not enforce a failed CSRF token check, allowing the destructive operation to proceed when the token is missing or invalid. A remote unauthenticated attacker can force an authenticated administrator who visits an attacker-controlled page to permanently delete all entries belonging to an attacker-selected Express entity on a web application to which the administrator is currently authenticated. Because the default Contact Express object ships with a fixed entity UUID, the target identifier can be obtained without dashboard access. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Pratik Zanjurne for reporting.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 24, 2026

References (1)

Vendor Advisories for CVE-2026-81907(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 23× in last 7d / 44× 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 08:08 UTCEG score recompute
  2. 2026-09-25 08:08 UTCGHSA enrichment
  3. 2026-09-24 20:15 UTCEG score recompute▲ 1.00
  4. 2026-09-24 20:15 UTCGHSA enrichment
  5. 2026-09-24 20:15 UTCNVD updateCVSS v3 → 7.1 · severity → HIGH
  6. 2026-09-24 14:04 UTCEPSS rescore
  7. 2026-09-24 10:22 UTCEG score recompute
  8. 2026-09-24 10:22 UTCGHSA enrichment
  9. 2026-09-23 17:54 UTCEPSS rescore
  10. 2026-09-23 08:02 UTCEG score recompute
  11. 2026-09-23 08:02 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 05:42 UTCEG score recompute
  14. 2026-09-22 05:42 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 03:22 UTCEG score recompute
  17. 2026-09-21 03:22 UTCGHSA enrichment
  18. 2026-09-20 20:16 UTCEPSS rescore
  19. 2026-09-20 01:02 UTCEG score recompute
  20. 2026-09-20 01:02 UTCGHSA enrichment
  21. 2026-09-18 22:39 UTCEG score recompute
  22. 2026-09-18 22:39 UTCGHSA enrichment
  23. 2026-09-18 19:28 UTCEPSS rescore
  24. 2026-09-17 20:19 UTCEG score recompute
  25. 2026-09-17 20:19 UTCGHSA enrichment
Show 19 more
  1. 2026-09-16 17:59 UTCEG score recompute
  2. 2026-09-16 17:59 UTCGHSA enrichment
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-15 15:01 UTCEG score recompute
  6. 2026-09-15 15:01 UTCGHSA enrichment
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-14 13:29 UTCEG score recompute
  10. 2026-09-14 13:29 UTCGHSA enrichment
  11. 2026-09-14 13:10 UTCEG score recompute
  12. 2026-09-14 13:10 UTCGHSA enrichment
  13. 2026-09-14 02:01 UTCEG score recompute
  14. 2026-09-14 02:01 UTCGHSA enrichment
  15. 2026-09-12 23:41 UTCEG score recompute
  16. 2026-09-12 23:41 UTCGHSA enrichment
  17. 2026-09-11 21:21 UTCEG score recompute
  18. 2026-09-11 20:29 UTCEG score recompute
  19. 2026-09-11 20:28 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-81907?
CVE-2026-81907 is a high vulnerability published on September 11, 2026. Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery (CSRF) in the Express "Clear Entries" function (POST /index.php/dashboard/system/express/entities/delete_entries) because the controller records but does not enforce a failed CSRF token check, allowing the destructive…
When was CVE-2026-81907 disclosed?
CVE-2026-81907 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81907 actively exploited?
CVE-2026-81907 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 79.8% of all scored CVEs.
What is the CVSS score of CVE-2026-81907?
CVE-2026-81907 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-81907?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81907, 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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