CVE-2025-3879 Vault’s Azure Authentication Method bound_location Restriction Could be Bypassed on Login

What is CVE-2025-3879?

CVE-2025-3879 is a medium-severity authentication bypass vulnerability in Hashicorp Vault, published on 2 May 2025. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Vault Community, Vault Enterprise (“Vault”) Azure Auth method did not correctly validate the claims in the Azure-issued token, resulting in the potential bypass of the bound_locations parameter on login. Fixed in Vault Community Edition 1.19.1 and Vault Enterprise 1.19.1, 1.18.7, 1.17.14, 1.16.18.

Weakness: CWE-863

Which versions are affected by CVE-2025-3879?

4 open source packages ship an affected version, including github.com/hashicorp/vault and vault. It affects 1 product.

Products include Hashicorp Vault.

How do I fix CVE-2025-3879?

Upgrade github.com/hashicorp/vault to 1.19.1 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2025-3879 being exploited?

There is no known exploitation of CVE-2025-3879 in the wild and no public exploit code.

Other vulnerabilities in Hashicorp Vault

• CVE-2020-35192 Hardcoded credentials in n/a Critical 9.8
• CVE-2020-12757 Improper Input Validation in HashiCorp Vault Critical 9.8
• CVE-2025-6000 Arbitrary Remote Code Execution via Plugin Catalog Abuse Critical 9.1
• CVE-2022-40186 HashiCorp Vault vulnerable to incorrect metadata access Critical 9.1
• CVE-2022-36129 Missing authorization in n/a Critical 9.1

All Hashicorp Vault vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-vault-2025-3879, GHSA-f9ch-h8j7-8jwg, GO-2025-3662.