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CVE-2026-47723— nebula-mesh: Web UI and API responses lack security headers (CSP, X-Frame-Options, HSTS, etc.)

Quick assessment

Affected
juev nebula-mesh
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Forgekeep nebula-mesh是Forgekeep团队的一系列网络代理和VPN整合软件。 Forgekeep nebula-mesh 0.3.1之前版本存在处理逻辑错误漏洞，该漏洞源于内部Web和API响应路径中未设置标准浏览器安全标头，可能导致浏览器安全策略失效。

CVSS 7.1 · High EPSS 0.53% · P42

Possible ATT&CK Techniques 1 AI

T1001 · Data Obfuscation

Affected Version Matrix 1

VendorProduct Version RangeStatus
juev nebula-mesh < 0.3.1 affected
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I. Basic Information for CVE-2026-47723

Vulnerability Information
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Vulnerability Title
nebula-mesh: Web UI and API responses lack security headers (CSP, X-Frame-Options, HSTS, etc.)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不当限制渲染UI层或帧
Source: CVE Program / CVE List V5
Vulnerability Title
Forgekeep nebula-mesh 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Forgekeep nebula-mesh是Forgekeep团队的一系列网络代理和VPN整合软件。 Forgekeep nebula-mesh 0.3.1之前版本存在处理逻辑错误漏洞，该漏洞源于内部Web和API响应路径中未设置标准浏览器安全标头，可能导致浏览器安全策略失效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
juev nebula-mesh < 0.3.1 -

II. Public POCs for CVE-2026-47723

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5944 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-47723

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Vendor Advisories for CVE-2026-47723 (1)

Vendor Pages for CVE-2026-47723 (1)

Same Patch Batch · juev · 2026-07-23 · 3 CVEs total

CVE-2026-47724 9.9 CRITICAL nebula-mesh: API endpoints lack ownership checks, enabling cross-operator privilege escala
CVE-2026-47722 8.7 HIGH nebula-mesh: Host advanced overrides allow YAML injection into agent config.yml

IV. Related Vulnerabilities

Same product: nebula-mesh
Same vendor: juev
Same weakness: CWE-1021

V. Comments for CVE-2026-47723

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