CVE-2026-7776High· 7.5▾ TwilightHashicorp Boundary workers are vulnerable to a denial-of-service condition during node enrollment TLS handshakes
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 21.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.2%
Boundary Community Edition and Boundary Enterprise ("Boundary") workers are vulnerable to a denial-of-service condition during node enrollment TLS handshakes. An attacker with network access to the worker authentication listener may open a connection and delay or withhold the client certificate during the TLS handshake, causing worker connection handling to block. This may prevent legitimate worker connections from being accepted or routed. This vulnerability, CVE-2026-7776, is fixed in Boundary 0.21.3, 0.20.3, 0.19.5.
github.com/hashicorp/boundary < 0.19.5github.com/hashicorp/boundary >= 0.20.0, < 0.20.3github.com/hashicorp/boundary >= 0.21.0, < 0.21.3Upgrade to a patched release:
github.com/hashicorp/boundary 0.19.5github.com/hashicorp/boundary 0.20.3github.com/hashicorp/boundary 0.21.3Connected by shared product, vendor, weakness, or advisory.
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