CVE-2026-61699High· 8.1▾ MidnightPoC availablenebula-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 an…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 44.6 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
Exploit / PoC code exists
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/forgekeep/nebula-mesh < 0.7.1Patched in:
github.com/forgekeep/nebula-mesh 0.7.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-55513Medium· 5.4nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN
CVE-2026-53604High· 7.1nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN
CVE-2026-53603High· 7.1nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN
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