CVE-2026-18119

CRITICALNVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score 9.0 from GitHub Security Advisory (severity: HIGH) published 2026-09-14. NVD baseline CVSS 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.0EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.0Exploit: None knownExposed services: Not assessed

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

Concrete CMS below 9.5.3 did not sanitize custom style values in the Block Design dialog before writing them into page CSS via a DOM sink, permitting stored cross-site scripting. An editor-level user could execute script in an administrator's session and escalate privileges. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 7.0 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Nguyen Manh Thuan for reporting.

CVSS v3
9.0
EG Score
9.0CRITICALhigh confidence
EG Risk
41
EG Risk 41/100CISA 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
Severity90% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
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
21st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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 partial (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 14, 2026

Last Modified

September 18, 2026

References (1)

Vendor Advisories for CVE-2026-18119(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 52× in last 7d / 137× 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 137 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18119?
CVE-2026-18119 is a critical vulnerability published on September 14, 2026. Concrete CMS below 9.5.3 did not sanitize custom style values in the Block Design dialog before writing them into page CSS via a DOM sink, permitting stored cross-site scripting. An editor-level user could execute script in an administrator's session and escalate privileges. The Concrete CMS…
When was CVE-2026-18119 disclosed?
CVE-2026-18119 was first published on September 14, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18119 actively exploited?
CVE-2026-18119 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18119?
CVE-2026-18119 has a CVSS v3 base score of 9.0 (NVD).
How do I remediate CVE-2026-18119?
No fix for CVE-2026-18119 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-2026-18119 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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