What is CVE-2020-7956?

CVE-2020-7956 is a critical-severity vulnerability in Hashicorp Nomad, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2020-01-31.

How severe is CVE-2020-7956?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Hashicorp Nomad

CVE-2020-7956

HashiCorp Nomad and Nomad Enterprise up to 0.10.2 incorrectly validated role/region associated with TLS certificates used for mTLS RPC, and were susceptible to privilege escalation. Fixed in 0.10.3.

Vulnerability class: Improper Certificate Validation

Published 2020-01-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Hashicorp Nomad

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

www.hashicorp.com/blog/category/nomad/ (Vendor Advisory)
github.com/hashicorp/nomad/issues/7003 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-7956?: CVE-2020-7956 is a critical-severity vulnerability in Hashicorp Nomad, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2020-01-31.
How severe is CVE-2020-7956?: Critical severity. CVSS v3 base score is 9.8 out of 10.