CVE-2026-63464Public exploitNetwork attack vector

Authenticated SSRF via unchecked allow_private setting

Published Sep 4, 2026 · Updated Sep 8, 2026

SSRF in Forgekeep nebula-mesh 0.6.0 through 0.7.1 allows remote authenticated users to send blind POST requests to internal services. The create and update webhook handlers persist operator-supplied AllowPrivate without an admin role check, causing the dispatcher to use its unguarded HTTP client. A role user who owns a subscription can probe private, loopback, and link-local addresses through delivery status and error details, but response bodies are not returned.

CVSS severity7.7
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Forgekeep nebula-mesh 0.6.0 through 0.7.1 allows remote authenticated users to send blind POST requests to internal services. The create and update webhook handlers persist operator-supplied AllowPrivate without an admin role check, causing the dispatcher to use its unguarded HTTP client. A role user who owns a subscription can probe private, loopback, and link-local addresses through delivery status and error details, but response bodies are not returned.

The record

CVE
CVE-2026-63464
Published
Sep 4, 2026
Updated
Sep 8, 2026
Vendor
Forgekeep
Product
nebula-mesh
Classifications
CWE-862, CWE-918, T1046
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=>= 0.6.0, < 0.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Forgekeep · nebula-meshversion=>= 0.6.0, < 0.7.2

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A: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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

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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