CVE-2026-48058: CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute in juev nebula-mesh
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.
AI Analysis
Technical Summary
The juev nebula-mesh control plane for Slack Nebula mesh VPN versions before 0.3.2 set HttpOnly and SameSite=Lax on cookies but omitted the Secure attribute. Without Secure, cookies can be sent over unencrypted HTTP connections, exposing session data if a plaintext request occurs (e.g., LAN operator access, mistyped URL, or reverse proxy misconfiguration). This vulnerability is identified as CWE-614 and has a CVSS 4.6 (medium) score. The issue is patched in version 0.3.2.
Potential Impact
Session cookies lacking the Secure attribute may be transmitted in plaintext over HTTP, risking session disclosure. This can lead to unauthorized session hijacking if an attacker can capture network traffic from such plaintext requests. However, exploitation requires conditions such as a plaintext request to the origin, which may involve operator error or misconfiguration.
Mitigation Recommendations
Upgrade juev nebula-mesh to version 0.3.2 or later, where the Secure attribute is properly set on cookies. This patch addresses the vulnerability by ensuring cookies are only sent over secure HTTPS connections. No additional mitigations are specified.
CVE-2026-48058: CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute in juev nebula-mesh
Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.2, 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.
CVSS v4.0
Score 4.6medium
Affected software
juev
nebula-mesh
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The juev nebula-mesh control plane for Slack Nebula mesh VPN versions before 0.3.2 set HttpOnly and SameSite=Lax on cookies but omitted the Secure attribute. Without Secure, cookies can be sent over unencrypted HTTP connections, exposing session data if a plaintext request occurs (e.g., LAN operator access, mistyped URL, or reverse proxy misconfiguration). This vulnerability is identified as CWE-614 and has a CVSS 4.6 (medium) score. The issue is patched in version 0.3.2.
Potential Impact
Session cookies lacking the Secure attribute may be transmitted in plaintext over HTTP, risking session disclosure. This can lead to unauthorized session hijacking if an attacker can capture network traffic from such plaintext requests. However, exploitation requires conditions such as a plaintext request to the origin, which may involve operator error or misconfiguration.
Mitigation Recommendations
Upgrade juev nebula-mesh to version 0.3.2 or later, where the Secure attribute is properly set on cookies. This patch addresses the vulnerability by ensuring cookies are only sent over secure HTTPS connections. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-20T18:25:25.707Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a68fdfd9c2644c7f811681e
Added to database: 07/28/2026, 19:07:41 UTC
Last enriched: 07/29/2026, 23:28:41 UTC
Last updated: 09/11/2026, 07:31:53 UTC
Views: 72
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.