CVE-2026-47723: CWE-1021: Improper Restriction of Rendered UI Layers or Frames in juev nebula-mesh
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.1, none of the response paths in `internal/web/` or `internal/api/` set the standard browser-security headers. `grep` for `Content-Security-Policy`, `X-Frame-Options`, `Strict-Transport-Security`, `X-Content-Type-Options`, `Referrer-Policy` returns zero matches across the codebase. Version 0.3.1 fixes the issue.
AI Analysis
Technical Summary
The vulnerability in juev nebula-mesh (CVE-2026-47723) involves the absence of standard browser security headers in all response paths under internal/web/ and internal/api/ directories prior to version 0.3.1. This lack of headers such as Content-Security-Policy and X-Frame-Options constitutes improper restriction of rendered UI layers or frames (CWE-1021), potentially enabling UI-based attacks. The issue is fixed in version 0.3.1.
Potential Impact
Without standard browser security headers, affected versions are susceptible to UI-based attacks such as clickjacking and content injection, which can lead to user interface manipulation and potential information disclosure. The CVSS 4.0 score is 7.1 (high severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, low confidentiality impact, high integrity impact, and no availability impact.
Mitigation Recommendations
Upgrade to nebula-mesh version 0.3.1 or later, which includes the necessary standard browser security headers to mitigate this vulnerability. Since no official remediation level or patch links are provided, the vendor's version 0.3.1 is the known fix. Patch status is confirmed by the versioning information.
CVE-2026-47723: CWE-1021: Improper Restriction of Rendered UI Layers or Frames in juev nebula-mesh
Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.1, none of the response paths in `internal/web/` or `internal/api/` set the standard browser-security headers. `grep` for `Content-Security-Policy`, `X-Frame-Options`, `Strict-Transport-Security`, `X-Content-Type-Options`, `Referrer-Policy` returns zero matches across the codebase. Version 0.3.1 fixes the issue.
CVSS v4.0
Score 7.1high
Affected software
pkg:github/forgekeep/nebula-meshRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in juev nebula-mesh (CVE-2026-47723) involves the absence of standard browser security headers in all response paths under internal/web/ and internal/api/ directories prior to version 0.3.1. This lack of headers such as Content-Security-Policy and X-Frame-Options constitutes improper restriction of rendered UI layers or frames (CWE-1021), potentially enabling UI-based attacks. The issue is fixed in version 0.3.1.
Potential Impact
Without standard browser security headers, affected versions are susceptible to UI-based attacks such as clickjacking and content injection, which can lead to user interface manipulation and potential information disclosure. The CVSS 4.0 score is 7.1 (high severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, low confidentiality impact, high integrity impact, and no availability impact.
Mitigation Recommendations
Upgrade to nebula-mesh version 0.3.1 or later, which includes the necessary standard browser security headers to mitigate this vulnerability. Since no official remediation level or patch links are provided, the vendor's version 0.3.1 is the known fix. Patch status is confirmed by the versioning information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-19T21:29:25.482Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a62781b9c2644c7f8a7dd80
Added to database: 07/23/2026, 20:22:51 UTC
Last enriched: 07/23/2026, 20:36:59 UTC
Last updated: 07/23/2026, 21:01:37 UTC
Views: 5
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