How severe is CVE-2021-30476?

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

Vulnerability in Hashicorp Terraform Provider

CVE-2021-30476

HashiCorp Terraform’s Vault Provider (terraform-provider-vault) did not correctly configure GCE-type bound labels for Vault’s GCP auth method. Fixed in 2.19.1.

Published 2021-04-22 · 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: 0.016 (75.6th percentile), scored 2026-10-27.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Hashicorp Terraform Provider

References

github.com/hashicorp/terraform-provider-vault/issues/996 (Exploit, Patch, Third Party Advisory)
discuss.hashicorp.com/t/hcsec-2021-11-terraform-s-vault-provider-did-not-correc… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-30476?: CVE-2021-30476 is a critical-severity vulnerability in Hashicorp Terraform Provider. CVSS score: 9.8/10. Published 2021-04-22.
How severe is CVE-2021-30476?: Critical severity. CVSS v3 base score is 9.8 out of 10.