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TI-2026-30101 Aliases CVE-2026-41518

Chartbrew has a stored DOM XSS via Chart Tooltip innerHTML (ChartDatasetConfig.legend)

Priority HIGH 66CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. In versions 4.9.0 through 5.0.0, an authenticated user with project-editor permissions can store arbitrary HTML/JavaScript in the `ChartDatasetConfig.legend` field. The payload is persisted verbatim in the database, propagated through the Chart.js rendering pipeline, and injected into the tooltip DOM element via an unguarded `innerHTML` assignment in `ChartTooltip.js`. Every unauthenticated viewer of the public dashboard triggers JavaScript execution on page load — no hover interaction is required. Browser-based Playwright verification confirmed `alert('localhost')` fires immediately and `<img src="x" onerror="alert(document.domain)">` is present in the `#chartjs-tooltip` DOM element. Version 5.0.1 contains a fix.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Fix Fixed chartbrew (chartbrew): 5.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
chartbrewchartbrew4.9.0 to before 5.0.15.0.1Patch availableCNA
  • chartbrew Vendorchartbrew Affected 4.9.0 to before 5.0.1 Fixed in 5.0.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:depomo:chartbrew:*:*:*:*:*:*:*:*——chartbrew
  • cpe:2.3:a:depomo:chartbrew:*:*:*:*:*:*:*:* Versions — — ·chartbrew

Remediation

  • Fix · CNA chartbrew (chartbrew) Fixed in 5.0.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41518

References

Other 1

  • TI-2026-46993 Chartbrew: SQL Injection via Missing Backslash Escaping in ClickHouse Variable Substitution CVSS 4.0HIGH 7.9
  • TI-2026-29337 Chartbrew: Missing Authorization in /api/chart/:chart_id/query via team-level refresh toggle CVSS 3.1HIGH 7.5
  • TI-2026-29331 Chartbrew: Incorrect Access Control in public chart and export routes via missing onReport and SharePolicy checks CVSS 3.1HIGH 7.5
  • TI-2026-29560 Chartbrew: Incorrect Access Control in dataset and dataRequest routes via team-scoped permission checks CVSS 3.1HIGH 8.1
  • TI-2026-29336 Chartbrew: Incorrect Access Control in project share policy routes via unbound policy_id CVSS 3.1HIGH 8.1
  • TI-2026-24781 Chartbrew Cross-Tenant Template Export and Secret Disclosure in `GET /team/:team_id/template/generate/:project_id` CVSS 3.1HIGH 7.7
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences