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Test your applicationsUpgrade stigmem-node to version 0.9.0a2 or higher.
stigmem-node is a Stigmem reference node — single-host production implementation
Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the peer registration process. An attacker can impersonate a federation peer or intercept registration by submitting malicious key material without requiring explicit administrator approval or out-of-band fingerprint verification. This is only exploitable if federation peer registration is exposed to untrusted networks and administrator approval is not enforced.
This vulnerability can be mitigated by restricting peer registration endpoints to trusted administrative networks and verifying peer public-key fingerprints out of band before allowing federation traffic.