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VulnerabilityPublished

CVE-2026-7776: HashiCorp Boundary · Unthrottled Resource Allocation

Affects HashiCorp BoundarySource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 0.21.3 soon.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
HashiCorpBoundaryAffected
  • >=0.9.0 <0.19.5
Fixed in
  • 0.21.3
HashiCorpBoundary EnterpriseAffected
  • >=0.9.0 <0.19.5
Fixed in
  • 0.21.3
GitHubBoundarypkg:github/BoundaryOther threatsAffected
  • >=0.9.0 <0.19.5
Fixed in
  • 0.19.5
GitHubBoundary Enterprisepkg:github/Boundary EnterpriseOther threatsAffected
  • >=0.9.0 <0.19.5
Fixed in
  • 0.19.5

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.

References

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