CVE-2026-7776: HashiCorp Boundary · Unthrottled Resource Allocation
Affects HashiCorp BoundarySource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 0.21.3 soon.
Data as of 31 Oct 2026, 20:20 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.21.3, 0.19.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 4 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.
What to do
Upgrade Boundary and Boundary Enterprise to 0.21.3; Boundary and Boundary Enterprise to 0.19.5.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| HashiCorpBoundary | Affected
| Fixed in
|
| HashiCorpBoundary Enterprise | Affected
| Fixed in
|
GitHubBoundarypkg:github/BoundaryOther threats | Affected
| Fixed in
|
GitHubBoundary Enterprisepkg:github/Boundary EnterpriseOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
This vulnerability is fixed in HashiCorp Boundary versions 0.21.3, 0.20.3, and 0.19.5. Users should upgrade to one of these fixed versions to remediate the issue. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor advisory embedded in the description.
Description
CVE-2026-7776 is a denial-of-service vulnerability in HashiCorp Boundary Community and Enterprise Editions affecting worker nodes during TLS handshakes. An attacker with network access to the worker authentication listener can open connections and delay or withhold client certificates, causing the worker connection handling to block. This blocks legitimate worker connections from being accepted or routed, potentially disrupting service availability. The vulnerability is fixed in Boundary versions 0.21.3, 0.20.3, and 0.19.5.