CVE-2026-53602Network attack vector

Certificate reissuance via missing revocation checks

Published Sep 4, 2026 · Updated Sep 4, 2026

Missing authorization in Forgekeep nebula-mesh before 0.3.7 allows remote attackers controlling offboarded hosts to regain valid certificates. The enrollment and renewal paths sign certificates without checking the host blocklist, host status, owning operator status, or CA status. Re-enrollment requires an operator-minted token, while a host under a disabled operator can renew automatically and retain mesh credentials.

CVSS severity6.9
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Forgekeep nebula-mesh before 0.3.7 allows remote attackers controlling offboarded hosts to regain valid certificates. The enrollment and renewal paths sign certificates without checking the host blocklist, host status, owning operator status, or CA status. Re-enrollment requires an operator-minted token, while a host under a disabled operator can renew automatically and retain mesh credentials.

The record

CVE
CVE-2026-53602
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
Forgekeep
Product
nebula-mesh
Classifications
CWE-862, CWE-285, T1649
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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.

  1. Affected versionversion=< 0.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Forgekeep · nebula-meshversion=< 0.3.7

Published CVSS scores

6.9GitHub Security AdvisoriesCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-285Improper Authorization
T1649Steal or Forge Authentication Certificates

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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