Auth bypass in Hashicorp Consul
CVE-2026-19017
Consul Community Edition and Consul Enterprise 1.18.21 through 2.0.2 are vulnerable to a partial arbitrary file read when configured to use the Vault Connect CA provider with JWT or AppRole authentication. A privileged attacker with `operator:write` permission may direct Consul to read and forward credential files outside the intended scope, potentially leading to the exfiltration of sensitive secrets from the Consul server host. This vulnerability, CVE-2026-19017, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Hashicorp Consul — versions 1.18.21
- Hashicorp Consul Enterprise — versions 1.18.21
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-19017?
- CVE-2026-19017 is a medium-severity vulnerability in Hashicorp Consul, classified under Missing Authorization. CVSS score: 6.8/10. Published 2026-08-07.
- How severe is CVE-2026-19017?
- Medium severity. CVSS v3 base score is 6.8 out of 10.