Vulnerability in Juev Nebula-Mesh

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.

EPSS: 0.002 (9.1th percentile) — read the EPSS interpretation.

Affected products

Juev Nebula-mesh — versions < 0.3.2

Weakness classification (CWE)

CWE-614 — Sensitive Cookie in HTTPS Session Without 'Secure' Attribute

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)