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VulnerabilityPublished

CVE-2026-45627: getarcaneapp arcane · Cross-site Scripting

Affects getarcaneapp arcaneSource CVE Database V5

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Not known to be exploited · CVSS 8.2 High : upgrade to 1.19.0 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.19.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade arcane and getarcaneapp/arcane to 1.19.0.

Affected software

ProductAffectedFixed in
getarcaneapparcaneAffected
  • <1.19.0
Fixed in
  • 1.19.0
GitHubgetarcaneapp/arcanepkg:github/getarcaneapp/arcaneOther threatsAffected
  • <1.19.0
Fixed in
  • 1.19.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

This vulnerability is fixed in Arcane version 1.19.0. Users should upgrade to version 1.19.0 or later to remediate the issue. Until upgraded, avoid navigating admin users to untrusted URLs that include crafted 'color' parameters in the affected endpoint.

Description

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.

References

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