Boundary Workers Vulnerable to Denial of Service During TLS Handshake
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 0.19.5, 0.20.3, 0.21.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- HashiCorp Boundary
From 0.9.0 · fixed in 0.19.5
- HashiCorp Boundary Enterprise
From 0.9.0 · fixed in 0.19.5
- github.com/hashicorp/boundaryGo
fixed in 0.19.5
- github.com/hashicorp/boundaryGo
From 0.20.0 · fixed in 0.20.3
- github.com/hashicorp/boundaryGo
From 0.21.0 · fixed in 0.21.3
- github.com/hashicorp/boundaryGo
fixed in 0.19.5; From 0.20.0 · fixed in 0.20.3; From 0.21.0 · fixed in 0.21.3