What is GHSA-8r5m-3f66-qpr3?

GHSA-8r5m-3f66-qpr3 is a security advisory published by GitHub Security Advisories with Medium severity. HashiCorp Vault has Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS

Which CVE IDs does GHSA-8r5m-3f66-qpr3 cover?

GHSA-8r5m-3f66-qpr3 covers the following CVE IDs: CVE-2026-5052. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-8r5m-3f66-qpr3?

GHSA-8r5m-3f66-qpr3 has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

Which products are affected by GHSA-8r5m-3f66-qpr3?

GHSA-8r5m-3f66-qpr3 affects 1 product, including: go/github.com/hashicorp/vault:\u003e= 1.14.0, \u003c= 1.21.4.

GHSA-8r5m-3f66-qpr3MediumCVSS 5.3

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

Vendor

GitHub Security Advisories

Published

April 17, 2026

Last Modified

July 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-5052 →

📋 Description

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.

🎯 Affected products1

go/github.com/hashicorp/vault:>= 1.14.0, <= 1.21.4

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-5052
https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343
https://github.com/advisories/GHSA-8r5m-3f66-qpr3