CVE-2026-18113

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (19th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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

In Concrete CMS 9.0 to 9.5.2, the Top Navigation Bar block did not HTML-escape dropdown child page names before writing them into the page, so a user who could create or rename pages could store a script through a child page name and have it run in the browser of any visitor, editor, or administrator who viewed the navigation and opened the affected dropdown. In the Concrete CMS origin, the script executed with the victim's privileges and could read same-origin content or perform actions available to that user. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 7.5 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks labixiaoxin97 for reporting.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100CISA SSVC

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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
19th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 15, 2026

Last Modified

September 20, 2026

References (1)

Vendor Advisories for CVE-2026-18113(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 28× in last 7d / 77× 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. 2026-10-05 03:40 UTCEG score recompute
  2. 2026-10-05 03:40 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 15:39 UTCGHSA enrichment
  5. 2026-10-04 03:37 UTCGHSA enrichment
  6. 2026-10-03 15:37 UTCEG score recompute
  7. 2026-10-03 15:36 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 03:28 UTCEG score recompute
  10. 2026-10-03 03:28 UTCGHSA enrichment
  11. 2026-10-02 15:27 UTCGHSA enrichment
  12. 2026-10-02 03:22 UTCEG score recompute
  13. 2026-10-02 03:22 UTCGHSA enrichment
  14. 2026-10-01 19:49 UTCEPSS rescore
  15. 2026-10-01 14:42 UTCGHSA enrichment
  16. 2026-10-01 02:41 UTCEG score recompute
  17. 2026-10-01 02:41 UTCGHSA enrichment
  18. 2026-09-30 15:02 UTCEPSS rescore
  19. 2026-09-30 14:41 UTCGHSA enrichment
  20. 2026-09-30 02:22 UTCEG score recompute
  21. 2026-09-30 02:22 UTCGHSA enrichment
  22. 2026-09-29 15:20 UTCEPSS rescore
  23. 2026-09-29 14:20 UTCGHSA enrichment
  24. 2026-09-29 02:19 UTCEG score recompute
  25. 2026-09-29 02:19 UTCGHSA enrichment
Show 52 more
  1. 2026-09-28 14:18 UTCEG score recompute
  2. 2026-09-28 14:18 UTCGHSA enrichment
  3. 2026-09-28 13:51 UTCEPSS rescore
  4. 2026-09-28 02:16 UTCGHSA enrichment
  5. 2026-09-27 14:15 UTCEG score recompute
  6. 2026-09-27 14:15 UTCGHSA enrichment
  7. 2026-09-27 13:47 UTCEPSS rescore
  8. 2026-09-27 02:14 UTCEG score recompute
  9. 2026-09-27 02:14 UTCGHSA enrichment
  10. 2026-09-26 15:58 UTCEPSS rescore
  11. 2026-09-26 14:13 UTCGHSA enrichment
  12. 2026-09-26 01:55 UTCEG score recompute
  13. 2026-09-26 01:55 UTCGHSA enrichment
  14. 2026-09-25 13:47 UTCGHSA enrichment
  15. 2026-09-25 01:45 UTCEG score recompute
  16. 2026-09-25 01:45 UTCGHSA enrichment
  17. 2026-09-24 13:43 UTCGHSA enrichment
  18. 2026-09-24 01:42 UTCEG score recompute
  19. 2026-09-24 01:42 UTCGHSA enrichment
  20. 2026-09-23 13:41 UTCGHSA enrichment
  21. 2026-09-23 01:39 UTCEG score recompute
  22. 2026-09-23 01:39 UTCGHSA enrichment
  23. 2026-09-22 13:37 UTCGHSA enrichment
  24. 2026-09-22 01:36 UTCEG score recompute
  25. 2026-09-22 01:36 UTCGHSA enrichment
  26. 2026-09-21 13:35 UTCGHSA enrichment
  27. 2026-09-21 01:34 UTCEG score recompute
  28. 2026-09-21 01:34 UTCGHSA enrichment
  29. 2026-09-20 13:32 UTCGHSA enrichment
  30. 2026-09-20 01:31 UTCEG score recompute
  31. 2026-09-20 01:31 UTCGHSA enrichment
  32. 2026-09-20 01:02 UTCEG score recompute
  33. 2026-09-20 01:02 UTCGHSA enrichment
  34. 2026-09-19 19:33 UTCEG score recompute
  35. 2026-09-19 19:33 UTCGHSA enrichment
  36. 2026-09-19 07:32 UTCGHSA enrichment
  37. 2026-09-18 19:31 UTCEG score recompute
  38. 2026-09-18 19:31 UTCGHSA enrichment
  39. 2026-09-18 19:27 UTCEPSS rescore
  40. 2026-09-18 07:30 UTCEG score recompute
  41. 2026-09-18 07:30 UTCGHSA enrichment
  42. 2026-09-17 19:29 UTCGHSA enrichment
  43. 2026-09-17 07:25 UTCGHSA enrichment
  44. 2026-09-16 19:23 UTCGHSA enrichment
  45. 2026-09-16 18:35 UTCEG score recompute
  46. 2026-09-16 18:35 UTCGHSA enrichment
  47. 2026-09-16 14:07 UTCEPSS rescore
  48. 2026-09-16 06:33 UTCGHSA enrichment
  49. 2026-09-15 18:32 UTCEG score recompute
  50. 2026-09-15 18:32 UTCGHSA enrichment
  51. 2026-09-15 17:39 UTCEG score recompute
  52. 2026-09-15 17:38 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-18113?
CVE-2026-18113 is a high vulnerability published on September 15, 2026. In Concrete CMS 9.0 to 9.5.2, the Top Navigation Bar block did not HTML-escape dropdown child page names before writing them into the page, so a user who could create or rename pages could store a script through a child page name and have it run in the browser of any visitor, editor, or…
When was CVE-2026-18113 disclosed?
CVE-2026-18113 was first published on September 15, 2026, with the most recent update on September 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18113 actively exploited?
CVE-2026-18113 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18113?
CVE-2026-18113 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18113?
No fix for CVE-2026-18113 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-18113 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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