Server-side Request Forgery (SSRF) Affecting github.com/hashicorp/vault package, versions >=1.14.0 <2.0.0-rc1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMHASHICORPVAULT-16110818
- published20 Apr 2026
- disclosed17 Apr 2026
- creditUnknown
Introduced: 17 Apr 2026
CVE-2026-5052 Â (opens in a new tab)How to fix?
Upgrade github.com/hashicorp/vault to version 2.0.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) through the ValidateHTTP01Challenge and ValidateTLSALPN01Challenge validation paths in builtin/logical/pki/acme_challenges.go. An attacker can make the ACME validator connect to loopback, link-local, unspecified, multicast, or other non-global-unicast targets by supplying a challenge domain that resolves to those addresses or by using a literal IP address. This lets an attacker drive Vault to probe internal or local services during challenge verification, exposing those services to unauthorized access attempts and causing ACME validation to fail for legitimate users.