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CVE-2026-61699— nebula-mesh: Certificate revocation is never enforced at the mesh

Quick assessment

Affected
forgekeep 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团队的一款构建安全虚拟专用网络的组网工具。 Forgekeep nebula-mesh 0.7.1之前版本存在安全漏洞，该漏洞源于撤销机制未正确同步阻止列表至各对等方，导致已撤销主机仍能保持网络连接，攻击者可通过窃取密钥绕过撤销机制，维持网络访问权限。

CVSS 8.1 · High EPSS 0.45% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
forgekeep nebula-mesh < 0.7.1 affected
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I. Basic Information for CVE-2026-61699

Vulnerability Information
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Vulnerability Title
nebula-mesh: Certificate revocation is never enforced at the mesh
Source: CVE Program / CVE List V5
Vulnerability Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.7.1, revocation is the only in-band mechanism that isolates a compromised/offboarded host from a Nebula mesh. Because the blocklist never reaches any peer's config.yml, a Blocked host retains full overlay reachability to every peer under its CA (and internal services on the mesh) for up to 30d (agent) / 365d (mobile). An attacker who exfiltrates host.key+host.crt can run stock slackhq/nebula directly, ignore the agent's 403/410 poll responses, and stay connected after the operator revokes the host. Operator-visible state (UI shows blocked, audit log records it) is misleading. This issue has been patched in version 0.7.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书撤销验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Forgekeep nebula-mesh 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Forgekeep nebula-mesh是Forgekeep团队的一款构建安全虚拟专用网络的组网工具。 Forgekeep nebula-mesh 0.7.1之前版本存在安全漏洞，该漏洞源于撤销机制未正确同步阻止列表至各对等方，导致已撤销主机仍能保持网络连接，攻击者可通过窃取密钥绕过撤销机制，维持网络访问权限。
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
forgekeep nebula-mesh < 0.7.1 -

II. Public POCs for CVE-2026-61699

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III. Intelligence Information for CVE-2026-61699

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Patches & Fixes for CVE-2026-61699 (1)

Vendor Advisories for CVE-2026-61699 (1)

Vendor Pages for CVE-2026-61699 (1)

Same Patch Batch · forgekeep · 2026-09-04 · 7 CVEs total

CVE-2026-63464 7.7 HIGH Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_priva
CVE-2026-53603 7.1 HIGH nebula-mesh: Operator session tokens stored in plaintext in the database
CVE-2026-53604 7.1 HIGH nebula-mesh: CA private key not zeroized on web mobile-bundle error paths
CVE-2026-53602 6.9 MEDIUM nebula-mesh - Host revocation is not durable: blocked/offboarded hosts can regain a valid
CVE-2026-55513 5.4 MEDIUM nebula-mesh: Web UI host creation ignores configured enrollment token TTL and mints 24-hou
CVE-2026-55512 5.3 MEDIUM nebula-mesh: Unauthenticated OIDC login endpoint allocates unbounded in-memory state entri

IV. Related Vulnerabilities

Same product: nebula-mesh
Same vendor: forgekeep
Same weakness: CWE-299