CVE-2026-53604

HIGHPre-NVD 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: —CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

nebula-mesh: CA private key not zeroized on web mobile-bundle error paths

Impact

The web handler renderMobileBundle (internal/web/handlers.go:1325) passes the real *pki.CAResolver directly into mobilebundle.Build. Inside Build (internal/mobilebundle/builder.go:54), resolver.LoadByID decrypts the CA's ed25519 private key into a *pki.CAManager, but Build never calls CAManager.Wipe() on any return path (success or any of the error paths at lines 56, 62, 68, 80, 86, 92, 98, 102, 109, 118, 150).

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 (internal/api/mobile_bundle.go:74) already does this correctly: it loads the CAManager, defer caMgr.Wipe(), and wraps it in caManagerResolver. Only the web path is affected.

This is the same key-zeroization class previously addressed in GHSA-8h84-fhqq-q58v.

Patches

Add defer caMgr.Wipe() inside mobilebundle.Build immediately after the LoadByID call so every caller (web and API) is protected on all return paths. Ensure CAManager.Wipe() is idempotent, since the API handler also wipes the same manager.

Workarounds

None at the configuration level; requires a code fix.

Resources

  • internal/web/handlers.go:1325
  • internal/mobilebundle/builder.go:54
  • internal/api/mobile_bundle.go:74 (correct reference implementation)
  • Prior related advisory: GHSA-8h84-fhqq-q58v

CVSS v3
—
EG Score
0.0(none)
EPSS
—
KEV
Not listed

Published

July 14, 2026

Last Modified

July 14, 2026

Vendor Advisories for CVE-2026-53604(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 1× in last 7d / 1× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-14 20:10 UTCEG score recompute

Frequently asked(3)

What is CVE-2026-53604?
CVE-2026-53604 is a high vulnerability published on July 14, 2026. nebula-mesh: CA private key not zeroized on web mobile-bundle error paths Impact The web handler renderMobileBundle (internal/web/handlers.go:1325) passes the real pki.CAResolver directly into mobilebundle.Build. Inside Build (internal/mobilebundle/builder.go:54), resolver.LoadByID decrypts the…
When was CVE-2026-53604 disclosed?
CVE-2026-53604 was first published in the National Vulnerability Database on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
How do I remediate CVE-2026-53604?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53604, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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