Extended enrollment access via hardcoded token expiry
Published Sep 4, 2026 · Updated Sep 8, 2026
Insufficient token expiration in Forgekeep nebula-mesh 0.3.0 through 0.4.x allows remote authenticated users to extend host enrollment access. POST /ui/hosts sets new agent enrollment tokens to expire after 24 hours instead of applying the server or per-network configured TTL resolver. Any Web UI operator able to create a host can mint the bearer token; if exposed, it remains usable to enroll that pending host and obtain its certificate and configuration beyond the intended lifetime.
Summary
What happened
Insufficient token expiration in Forgekeep nebula-mesh 0.3.0 through 0.4.x allows remote authenticated users to extend host enrollment access. POST /ui/hosts sets new agent enrollment tokens to expire after 24 hours instead of applying the server or per-network configured TTL resolver. Any Web UI operator able to create a host can mint the bearer token; if exposed, it remains usable to enroll that pending host and obtain its certificate and configuration beyond the intended lifetime.
The record
- CVE
- CVE-2026-55513
- Published
- Sep 4, 2026
- Updated
- Sep 8, 2026
- Vendor
- Forgekeep
- Product
- nebula-mesh
- Classifications
- CWE-613
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 4, 2026CVE publishedPublication date reported by the CVE source.
- Sep 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 0.3.0, < 0.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Safe local Web UI TTL-bypass proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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