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TI-2026-33371 Aliases CVE-2026-45627GHSA-q2pj-8v84-9mh5

Arcane: Unauthenticated reflected XSS via SVG color parameter in /api/app-images/logo enables admin account takeover

Priority LOW 35CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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 and GitHub. Impact type from CWE-79.

Summary

Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.19.0, the unauthenticated GET /api/app-images/logo endpoint reflects a user-supplied color query parameter into the body of an SVG document via strings.ReplaceAll with no escaping. The substitution lands inside a <style> element of the embedded logo.svg, allowing an attacker to close the style block and inject executable <script> content. Because the response is served as image/svg+xml and Arcane sets no Content-Security-Policy or X-Content-Type-Options headers, navigating a logged-in admin victim to a crafted URL executes attacker-controlled JavaScript in Arcane's origin and rides the victim's HttpOnly JWT cookie to fully compromise the admin account. This vulnerability is fixed in 1.19.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Fix Fixed arcane (getarcaneapp): 1.19.0github.com/getarcaneapp/arcane/backend (Go): 1.19.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
getarcaneapparcanebefore 1.19.01.19.0Patch availableCNA
—github.com/getarcaneapp/arcane/backend (Go)before 1.19.01.19.0Patch availableGHSA-q2pj-8v84-9mh5
  • arcane Vendorgetarcaneapp Affected before 1.19.0 Fixed in 1.19.0 Patch available CNA
  • github.com/getarcaneapp/arcane/backend (Go) Vendor— Affected before 1.19.0 Fixed in 1.19.0 Patch available GHSA-q2pj-8v84-9mh5

Remediation

  • Fix · CNA arcane (getarcaneapp) Fixed in 1.19.0
  • Fix · GHSA-q2pj-8v84-9mh5 github.com/getarcaneapp/arcane/backend (Go) Fixed in 1.19.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45627
  2. 2026-10-03 Alias added: GHSA-q2pj-8v84-9mh5

References

Advisory 1

Other 2

  • TI-2026-33369 Missing authorization in getarcaneapp arcane CVSS 3.1CRITICAL 9.9
  • TI-2026-75557 Arcane users with delegated permission can take over admin accounts CVSS 3.1HIGH 8.8
  • TI-2026-34717 Arcane: Missing admin authorization on global variables endpoint CVSS 3.1HIGH 8.8
  • TI-2026-75556 Credential exfiltration in Arcane via registry URL repointing CVSS 3.1HIGH 8.5
  • TI-2026-34768 Arcane: Authenticated Arbitrary Host File Read via Docker Compose Include Directives in Arcane CVSS 3.1HIGH 7.7
  • TI-2026-58913 Arcane before 2.0.0 Missing Administrator Authorization on the Compose Template Mutation Endpoints CVSS 4.0HIGH 7.1
See all 8 →

Sources

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