Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-53602— nebula-mesh - Host revocation is not durable: blocked/offboarded hosts can regain a valid certificate

Quick assessment

Affected
forgekeep nebula-mesh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Forgekeep nebula-mesh是Forgekeep团队的一款构建安全虚拟专用网络的组网工具。 Forgekeep nebula-mesh 0.3.7之前版本存在授权问题漏洞，该漏洞源于证书签发过程中未重新评估撤销和授权状态，阻止列表在注册/重新注册时未被检查，自动续订时也未验证操作员/CA状态，可能导致不应再受信任的主机获得新的有效Nebula证书。

CVSS 6.9 · Medium EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1550 · Use Alternate Authentication Material

Affected Version Matrix 1

VendorProduct Version RangeStatus
forgekeep nebula-mesh < 0.3.7 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-53602

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
nebula-mesh - Host revocation is not durable: blocked/offboarded hosts can regain a valid certificate
Source: CVE Program / CVE List V5
Vulnerability Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.3.7, two related authorization gaps let a host that should no longer be trusted obtain a fresh, valid Nebula certificate, because nebula-mgmt does not re-evaluate revocation/authorization state at certificate issuance time — only at poll time. Firstly, the blocklist is not enforced at sign / re-enroll time. internal/api/enroll.go:128 calls caMgr.Sign(...) without consulting the blocklist. The blocklist is only checked in the poll path (internal/api/updates.go:57, fingerprintInBlocklist). The blocklist is keyed by certificate fingerprint (internal/store/sqlite.go), so a re-enrollment produces a new fingerprint that is not in the blocklist. Secondly, renewal does not re-validate operator / CA status. Auto-renewal at poll time (internal/api/updates.go:285-319, signHostCert) reads host.Name, host.Groups, host.NebulaIPs from the DB and re-signs without checking whether the owning operator is still active or the CA still valid. DisableOperator (internal/store/sqlite_operators.go) revokes sessions and API keys but does not retire the operator's CAs, and pki/signer.go checks only CA cert time-expiry, not operator/CA status. This issue has been patched in version 0.3.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Forgekeep nebula-mesh 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Forgekeep nebula-mesh是Forgekeep团队的一款构建安全虚拟专用网络的组网工具。 Forgekeep nebula-mesh 0.3.7之前版本存在授权问题漏洞，该漏洞源于证书签发过程中未重新评估撤销和授权状态，阻止列表在注册/重新注册时未被检查，自动续订时也未验证操作员/CA状态，可能导致不应再受信任的主机获得新的有效Nebula证书。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
forgekeep nebula-mesh < 0.3.7 -

II. Public POCs for CVE-2026-53602

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-53602

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-53602 (1)

Vendor Pages for CVE-2026-53602 (1)

Other References for CVE-2026-53602 (1)

Same Patch Batch · forgekeep · 2026-09-04 · 7 CVEs total

CVE-2026-61699 8.1 HIGH nebula-mesh: Certificate revocation is never enforced at the mesh
CVE-2026-63464 7.7 HIGH Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_priva
CVE-2026-53603 7.1 HIGH nebula-mesh: Operator session tokens stored in plaintext in the database
CVE-2026-53604 7.1 HIGH nebula-mesh: CA private key not zeroized on web mobile-bundle error paths
CVE-2026-55513 5.4 MEDIUM nebula-mesh: Web UI host creation ignores configured enrollment token TTL and mints 24-hou
CVE-2026-55512 5.3 MEDIUM nebula-mesh: Unauthenticated OIDC login endpoint allocates unbounded in-memory state entri

IV. Related Vulnerabilities

Same product: nebula-mesh
Same vendor: forgekeep
Same weakness: CWE-862

V. Comments for CVE-2026-53602

No comments yet

Leave a comment