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CVE-2026-53604— nebula-mesh: CA private key not zeroized on web mobile-bundle error paths

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.

nebula-mesh 是一个自托管的 Slack Nebula 网状 VPN 控制平面。在 0.3.8 版本之前，Web 处理程序 将真实的 直接传递给 。在 函数内部， 会将 CA 的 Ed25519 私钥解密并生成 ，但 在任何返回路径上都没有调用 。因此，当通过 Web UI 发起移动捆绑包（mobile-bundle）请求并返回时——尤其是在发生错误（如缺少网络、无效的网段前缀、数据库错误或签名失败）时——明文的 CA 私钥会残留在 Go 堆内存中，直到被垃圾回收器清理。能够读取进程内存的攻击者（通过核心

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
forgekeep nebula-mesh < 0.3.8 affected
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I. Basic Information for CVE-2026-53604

Vulnerability Information
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Vulnerability Title
nebula-mesh: CA private key not zeroized on web mobile-bundle error paths
Source: CVE Program / CVE List V5
Vulnerability Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.3.8, the web handler renderMobileBundle passes the real *pki.CAResolver directly into mobilebundle.Build. Inside Build, resolver.LoadByID decrypts the CA's ed25519 private key into a *pki.CAManager, but Build never calls CAManager.Wipe() on any return path. As a result, when a mobile-bundle request goes through the web UI and Build returns — especially on error (missing network, invalid prefix, DB error, signing failure) — the plaintext CA private key remains on the Go heap, unwiped, until garbage collection. An attacker able to read process memory (core dump, swap, memory-scraping) can recover the CA signing key, which would allow minting arbitrary host certificates for the mesh. The API handler already does this correctly: it loads the CAManager, defer caMgr.Wipe(), and wraps it in caManagerResolver. Only the web path is affected. This issue has been patched in version 0.3.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的不恰当跨边界移除
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
forgekeep nebula-mesh < 0.3.8 -

II. Public POCs for CVE-2026-53604

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III. Intelligence Information for CVE-2026-53604

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Patches & Fixes for CVE-2026-53604 (1)

Vendor Advisories for CVE-2026-53604 (1)

Vendor Pages for CVE-2026-53604 (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-2026-53602 6.9 MEDIUM nebula-mesh - Host revocation is not durable: blocked/offboarded hosts can regain a valid
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-212

V. Comments for CVE-2026-53604

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