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OpenAdvisories
Medium · 5.3 CVE-2026-5052 BIT-vault-2026-5052EUVD-2026-23344GHSA-8r5m-3f66-qpr3GO-2026-5262

Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS

Published Apr 17, 2026 · Updated Apr 17, 2026 · Assigned by HashiCorp

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 products

VendorProductAffectedFixed
HashiCorp Vault 1.15.0 – < 2.0.0 2.0.0
HashiCorp Vault Enterprise 1.15.0 – < 2.0.0 2.0.0

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling splunk-otel-collector 0.157.0-r0 —
Wolfi rolling splunk-otel-collector-compat 0.160.0-r0 —

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/hashicorp/vault >= 1.14.0, <= 1.21.4 — GHSA-8r5m-3f66-qpr3
Go github.com/hashicorp/vault >= 1.14.0 — GO-2026-5262

Advisories 2

References