CVE-2019-9764

mediumpriority · track · 30EPSS 0.006 · 49 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.61% (49th) EPSS

CVSS 5.8 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

HashiCorp Consul 1.4.3 lacks server hostname verification for agent-to-agent TLS communication. In other words, the product behaves as if verify_server_hostname were set to false, even when it is actually set to true. This is fixed in 1.4.4.

cvss

Technical severity, 0–10. One row per scoring source.

7.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–7.4

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.07.4highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 5.2

v3.07.4highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV

v3.06.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-346USprimaryCWE-346US

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
hashicorp consul= 1.4.3nvdUScpe:2.3:a:hashicorp:consul:*:*:*:*:*:*:*:*
Go github.com/hashicorp/consul< 1.4.4osvUSpkg:golang/github.com/hashicorp/consul

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-q7fx-wm2p-qfj8HashiCorp Consul vulnerable to Origin Validation Error2022-05-13ghsa · osvUS
HashiCorp Consul 1.4.3 lacks server hostname verification for agent-to-agent TLS communication. In other words, the product behaves as if `verify_server_hostname` were set to false, even when it is actually set to true. This is fixed in 1.4.4.
GO-2023-1853HashiCorp Consul vulnerable to Origin Validation Error in github.com/hashicorp/consul2024-08-20vendor · osvUS
HashiCorp Consul vulnerable to Origin Validation Error in github.com/hashicorp/consul

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2019-03-26modified 2026-06-17

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+920 more

references (5)

External citations — patches, advisories, analysis.

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