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CVE-2026-47725

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

MEDIUM
6.9
CVSS Score
Published: July 28, 2026 at 05:56 PM UTC
Updated: October 23, 2026 at 11:10 PM UTC
1 product affected across 1 vendorNebula Mesh

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Severity
MEDIUM6.9
Exploit prediction
EPSS 0.2%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nebula Mesh· Juev
90%
v < 0.3.3
Affected range stops below 0.3.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.9MEDIUMGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-352

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