CVE-2026-48058 MEDIUM

CVE-2026-48058: nebula-mesh: Session and OIDC state cookies lack the Secure attribute

Vendor Juev
Product nebula-mesh
Weakness CWE-614 · Cookie without Secure flag
Published July 28, 2026
Last update July 28, 2026
View on NVD All CVEs

CVSS base score

4.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 28, 2026 CVE published
July 28, 2026 Record updated