What’s Vulnerable › Vulnerabilities

CVE-2026-47725: nebula-mesh: Web UI lacks CSRF tokens on /ui/* mutating endpoints

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-28 · updated 2026-10-23
• Weakness: CWE-352

Description

nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.3, every /ui/* POST / PUT / PATCH / DELETE route processes the request as soon as the session cookie validates. SameSite=Lax on the session cookie prevents most cross-site form submits but does not protect: top-level form-submit navigations from third-party pages (some browsers still send Lax cookies on top-level POSTs); same-registrable-domain attackers (sibling-subdomain XSS, subdomain takeover); the GET /ui/logout route, which a third-party <img src=".../ui/logout"> can force-trigger. This issue has been patched in version 0.3.3.

Affected products

• juev nebula-mesh: before 0.3.3

References

• https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.3
• https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6
• https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6

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