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

Quick assessment

Affected
juev nebula-mesh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Forgekeep nebula-mesh是Forgekeep团队的一系列网络代理和VPN整合软件。 Forgekeep nebula-mesh 0.3.2之前版本存在会话机制问题漏洞，该漏洞源于未在cookie中设置Secure标志，可能导致通过明文请求泄露会话。

CVSS 4.6 · Medium EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
juev nebula-mesh < 0.3.2 affected
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I. Basic Information for CVE-2026-48058

Vulnerability Information
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Vulnerability Title
nebula-mesh: Session and OIDC state cookies lack the Secure attribute
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
HTTPS会话中未设置’Secure’属性的敏感Cookie
Source: CVE Program / CVE List V5
Vulnerability Title
Forgekeep nebula-mesh 会话机制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Forgekeep nebula-mesh是Forgekeep团队的一系列网络代理和VPN整合软件。 Forgekeep nebula-mesh 0.3.2之前版本存在会话机制问题漏洞，该漏洞源于未在cookie中设置Secure标志，可能导致通过明文请求泄露会话。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
juev nebula-mesh < 0.3.2 -

II. Public POCs for CVE-2026-48058

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III. Intelligence Information for CVE-2026-48058

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Vendor Advisories for CVE-2026-48058 (1)

Other References for CVE-2026-48058 (1)

Same Patch Batch · juev · 2026-07-28 · 6 CVEs total

CVE-2026-49258 8.8 HIGH Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and ne
CVE-2026-47726 7.1 HIGH nebula-mesh: GET /api/v1/audit-log discloses all entries to any operator
CVE-2026-48025 6.9 MEDIUM nebula-mesh: Decrypted CA private key persists in heap after signing
CVE-2026-47725 6.9 MEDIUM nebula-mesh: Web UI lacks CSRF tokens on /ui/* mutating endpoints
CVE-2026-47768 5.5 MEDIUM nebula-mesh: Newly-minted operator API key exposed in redirect URL (Referer, history, prox

IV. Related Vulnerabilities

Same product: nebula-mesh
Same vendor: juev
Same weakness: CWE-614

V. Comments for CVE-2026-48058

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