MEDIUM5.3
GHSA-8r5m-3f66-qpr3
HashiCorp Vault has Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS
Details
Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/hashicorp/vault
Introduced in:
1.14.0No fixed version published yet for github.com/hashicorp/vault (go modules). Pin to a known-safe version or switch to an alternative.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-5052[ADVISORY]
- https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343[WEB]
- https://github.com/advisories/GHSA-8r5m-3f66-qpr3[ADVISORY]
- https://github.com/hashicorp/vault[PACKAGE]