What is CVE-2020-10660?

CVE-2020-10660 is a medium-severity vulnerability in Hashicorp Vault, classified under Incorrect Default Permissions. CVSS score: 5.3/10. Published 2020-03-23.

How severe is CVE-2020-10660?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Hashicorp Vault

CVE-2020-10660

HashiCorp Vault and Vault Enterprise versions 0.9.0 through 1.3.3 may, under certain circumstances, have an Entity's Group membership inadvertently include Groups the Entity no longer has permissions to. Fixed in 1.3.4.

Published 2020-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Hashicorp Vault

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

www.hashicorp.com/blog/category/vault/ (Vendor Advisory)
github.com/hashicorp/vault/blob/master/CHANGELOG.md (Third Party Advisory)

Frequently asked questions

What is CVE-2020-10660?: CVE-2020-10660 is a medium-severity vulnerability in Hashicorp Vault, classified under Incorrect Default Permissions. CVSS score: 5.3/10. Published 2020-03-23.
How severe is CVE-2020-10660?: Medium severity. CVSS v3 base score is 5.3 out of 10.