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CVE-2019-9764

24
FAUCET Score

CVE-2019-9764 describes a critical vulnerability in HashiCorp Consul versions prior to 1.4.4, where agent-to-agent TLS communication fails to verify server hostnames, effectively bypassing intended security configurations. This high-severity flaw (CVSS 7.4) could allow an unauthenticated attacker to intercept or tamper with sensitive communications, leading to high confidentiality and integrity impacts, though it requires high attack complexity. There is currently no public exploit intelligence, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.4.3CPE matchmatch criteria
cpe:2.3:a:hashicorp:consul:1.4.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.4HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.60%
Probability of exploitation in next 30 days
EPSS Percentile
45.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0060 is in the 17th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/hashicorp/consulFixed in: 1.4.4

Vendor Advisories (1)

goGHSA-q7fx-wm2p-qfj8high

HashiCorp Consul vulnerable to Origin Validation Error

May 13, 2022

References

github.com / hashicorp/consul/issues/5519
ExploitThird Party Advisory