CVE-2026-48025 Details
Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.7, internal/pki/resolver.go:36-64 constructs a CAManager with the plaintext ed25519.PrivateKey after unwrapping via the master key; internal/pki/ca.go:13-16 stores it. Callers at internal/api/enroll.go:116, internal/api/updates.go:297, and internal/api/mobile_bundle.go:40 use the manager for one Sign() and drop the reference on function return — but the underlying slice contents are not wiped before release. The keystore package's contract (internal/keystore/keystore.go doc: "Callers MUST zeroise the returned plaintext DEK as soon as it is no longer needed") is not met by the CAManager consumer. Decrypted CA private keys persist in process heap until Go's GC scavenges the underlying slice — minutes to hours under load, indefinitely on idle servers. This issue has been patched in version 0.3.7.
A vulnerability exists in Nebula Mesh versions prior to 0.3.7, where the CA Manager is constructed with a plaintext Ed25519 private key. This key, after being decrypted with the master key, is not properly zeroed out before the reference is dropped, leaving it to persist in the process heap. This issue arises in the PKI resolver and CA handling components, and the unprotected key can remain in memory for extended periods, potentially leading to unauthorized access.
Users can update to Nebula Mesh version 0.3.7 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 28, 2026CISA-ADP
Assessed Jul 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/forgekeep/nebula-mesh/commit/bca1d5914fbaf3517d3b86145a802c00de4a8122 | [email protected] | Source CodeVendor |
| https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.7 | [email protected] | Release NotesVendor |
| https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-8h84-fhqq-q58v | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-244 | Improper Clearing of Heap Memory Before Release ('Heap Inspection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| forgekeep nebula-mesh | <= 0.3.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 29, 2026 | CVE Modified | CISA-ADP |
| Jul 28, 2026 | New CVE Received | [email protected] |