CVE-2019-9764 json
HashiCorp Consul vulnerable to Origin Validation Error
published 2019-03-26 7 y ago modified 2026-09-10 1 mo ago also GHSA-q7fx-wm2p-qfj8 , GO-2023-1853 , EUVD-2022-4910
- cvss
- 7.4
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/hashicorp/consul/issues/5519 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.4 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| GitHub | 3.0 | 7.4 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/hashicorp/consul | <1.4.4 |
1.4.4 |
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/hashicorp/consul/commit/7e11dd82aa8dae505b7307adcb68c9d3194b3b40
web, patch
-
github.com
/hashicorp/consul/issues/5519
web, exploit, third-party-advisory, report
-
nvd.nist.gov
/vuln/detail/CVE-2019-9764
advisory
-
github.com
/hashicorp/consul
package
-
github.com
/advisories/GHSA-q7fx-wm2p-qfj8
advisory
Sources
- CVE List CVE-2019-9764
- GitHub Advisory GHSA-q7fx-wm2p-qfj8
- NVD CVE-2019-9764
- OSV GO-2023-1853
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.