Vulnerabilities CVE-2026-48058

CVE-2026-48058

Medium

Open

TLP:CLEAR

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

NVD CVE.org

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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.

Details

CVSS Score: 4.6
EPSS Score ⓘ: 0.19%

9.3th percentile
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
Confidence: 90%
Published: Jul 28, 2026
Last Modified: Jul 28, 2026

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