CVE-2026-53604Network attack vector

CA signing-key exposure via missing heap zeroization

Published Sep 4, 2026 · Updated Sep 8, 2026

Sensitive-data exposure in Forgekeep nebula-mesh before 0.3.8 allows remote authenticated users to leave CA signing keys in process memory. The web renderMobileBundle handler passes a CAResolver into mobilebundle.Build, whose LoadByID decrypts the key but never invokes CAManager.Wipe. Recovering the key requires process-memory read access through a core dump, swap, or memory scraping; the key can mint arbitrary mesh host certificates.

CVSS severity7.1
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-data exposure in Forgekeep nebula-mesh before 0.3.8 allows remote authenticated users to leave CA signing keys in process memory. The web renderMobileBundle handler passes a CAResolver into mobilebundle.Build, whose LoadByID decrypts the key but never invokes CAManager.Wipe. Recovering the key requires process-memory read access through a core dump, swap, or memory scraping; the key can mint arbitrary mesh host certificates.

The record

CVE
CVE-2026-53604
Published
Sep 4, 2026
Updated
Sep 8, 2026
Vendor
Forgekeep
Product
nebula-mesh
Classifications
CWE-316, CWE-212, T1552.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

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

  1. Affected versionversion=< 0.3.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Forgekeep · nebula-meshversion=< 0.3.8

Published CVSS scores

8.7GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.1GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-316Cleartext Storage of Sensitive Information in Memory
CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
T1552.004Unsecured Credentials: Private Keys

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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