CVE-2021-43998

Name: CVE-2021-43998
Creator: NVD / NIST
Published: 2021-11-30T15:15:07.36+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.01%

Last modified Jun 17, 2026

CVE-2021-43998 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. HashiCorp Vault and Vault Enterprise 0.11.0 up to 1.7.5 and 1.8.4 templated ACL policies would always match the first-created entity alias if multiple entity aliases exist for a specified entity and mount combination, potentially resulting in incorrect policy enforcement. Fixed in Vault and Vault Enterprise 1.7.6, 1.8.5, and 1.9.0.. EPSS estimates a 1.01% chance of exploitation in the next 30 days.

Description

HashiCorp Vault and Vault Enterprise 0.11.0 up to 1.7.5 and 1.8.4 templated ACL policies would always match the first-created entity alias if multiple entity aliases exist for a specified entity and mount combination, potentially resulting in incorrect policy enforcement. Fixed in Vault and Vault Enterprise 1.7.6, 1.8.5, and 1.9.0.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.01%

58.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions
Hashicorp	Vault	>= 0.11.0, <= 1.7.5
Hashicorp	Vault	1.8.4

References

https://discuss.hashicorp.com/t/hcsec-2021-30-vaults-templated-acl-policies-matched-first-created-alias-per-entity-and-auth-backend/32132Vendor Advisory
https://security.gentoo.org/glsa/202207-01Third Party Advisory
https://discuss.hashicorp.com/t/hcsec-2021-30-vaults-templated-acl-policies-matched-first-created-alias-per-entity-and-auth-backend/32132Vendor Advisory
https://security.gentoo.org/glsa/202207-01Third Party Advisory

Timeline

Published: Nov 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43998?

How severe is CVE-2021-43998?

CVE-2021-43998 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.01% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43998?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43998?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST