CVE-2026-48058

Description

nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.2, internal/web/session.go and internal/web/oidc.go set HttpOnly and SameSite=Lax on every cookie but never Secure. A single plaintext request to the origin (operator on a LAN, mistyped URL, HTTP→HTTPS not strictly enforced, reverse proxy misconfiguration) discloses the session. This issue has been patched in version 0.3.2.

Is your site exposed to CVE-2026-48058?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-614 CWE-614

References

Other References

https://github.com/forgekeep/nebula-mesh/commit/ffdd67dbf221d9a5855c39fbe11b49c245048d85 https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.2 https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-rqfj-vv8r-xhqc https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-rqfj-vv8r-xhqc

Frequently Asked Questions

What is CVE-2026-48058? +

nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.2, internal/web/session.go and internal/web/oidc.go set HttpOnly and SameSite=Lax on every cookie but never Secure. A single plaintext request to the origin (operator on a LAN, mistyped URL, HTTP→HTTPS not strictly enforced, reverse proxy misconfiguration) discloses the session. This issue has been patched in version 0.3.2.

How do I check if I'm vulnerable to CVE-2026-48058? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-46398

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 25.0.0 and prior to version 26.0.0, …

CVE-2025-0479

This vulnerability exists in the CP Plus Router due to insecure handling of cookie flags used within its web interface. …

CVE-2025-53757

This vulnerability exists in Digisol DG-GR6821AC Router due to misconfiguration of both Secure and HttpOnly flags on session cookies associated …

CVE-2026-53661

Boruta is a standalone authorization server that aims to implement OAuth 2.0 and Openid Connect up to decentralized identity specifications. …

CVE-2025-8037 9.1

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was …

CVE-2025-24897 8.2

Misskey is an open source, federated social media platform. Starting in version 12.109.0 and prior to version 2025.2.0-alpha.0, due to …