CVE-2026-81894

MEDIUMNVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: 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 stored DOM-based Cross-site Scripting (XSS) via the Gallery block's per-image Caption field because the bundled Magnific Popup lightbox script (concrete/js/features/imagery/frontend.js) re-parses the attribute-decoded caption as HTML through jQuery's .append() in titleSrc instead of inserting it as text. A user with permission to edit a page containing a Gallery block can store a caption that executes in the browser of any visitor who opens that image's lightbox. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.5 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 22, 2026

References (1)

Vendor Advisories for CVE-2026-81894(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 35× 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. 2026-09-24 16:03 UTCEG score recompute
  2. 2026-09-24 16:03 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 17:48 UTCGHSA enrichment
  6. 2026-09-22 19:34 UTCGHSA enrichment
  7. 2026-09-22 18:34 UTCEG score recompute
  8. 2026-09-22 18:34 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 12:06 UTCEG score recompute
  11. 2026-09-22 12:06 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 13:52 UTCEG score recompute
  14. 2026-09-21 13:52 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 15:37 UTCGHSA enrichment
  17. 2026-09-19 17:23 UTCEG score recompute
  18. 2026-09-19 17:23 UTCGHSA enrichment
  19. 2026-09-18 19:28 UTCEPSS rescore
  20. 2026-09-18 19:09 UTCEG score recompute▼ 3.10
  21. 2026-09-18 19:09 UTCGHSA enrichment
  22. 2026-09-18 19:06 UTCNVD updateCVSS v3 → 5.4 · severity → MEDIUM
  23. 2026-09-18 17:27 UTCGHSA enrichment
  24. 2026-09-18 06:24 UTCEG score recompute
  25. 2026-09-18 06:24 UTCGHSA enrichment
Show 10 more
  1. 2026-09-17 19:21 UTCGHSA enrichment
  2. 2026-09-17 06:38 UTCGHSA enrichment
  3. 2026-09-16 19:26 UTCGHSA enrichment
  4. 2026-09-16 15:34 UTCEG score recompute
  5. 2026-09-16 15:34 UTCGHSA enrichment
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 04:33 UTCGHSA enrichment
  8. 2026-09-15 17:32 UTCEG score recompute
  9. 2026-09-15 16:43 UTCEG score recompute
  10. 2026-09-15 16:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81894?
CVE-2026-81894 is a medium vulnerability published on September 15, 2026. Concrete CMS 9.5.2 and below is vulnerable to stored DOM-based Cross-site Scripting (XSS) via the Gallery block's per-image Caption field because the bundled Magnific Popup lightbox script (concrete/js/features/imagery/frontend.js) re-parses the attribute-decoded caption as HTML through jQuery's…
When was CVE-2026-81894 disclosed?
CVE-2026-81894 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81894 actively exploited?
CVE-2026-81894 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 86.9% of all scored CVEs.
What is the CVSS score of CVE-2026-81894?
CVE-2026-81894 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-81894?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81894, 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

Explore the affected products and dependency analysis for CVE-2026-81894

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