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GHSA-8r5m-3f66-qpr3

HashiCorp Vault has Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-5052

Packages

EcosystemPackageAffectedFixed in
Go github.com/hashicorp/vault >= 1.14.0, <= 1.21.4 no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.