Local Network Information Disclosure Risk in HashiCorp Vault PKI Engine
CVE-2026-5052

5.3MEDIUM

Key Information:

Vendor

Hashicorp
Status
Vault
Vault Enterprise
Vendor
CVE Published:
17 April 2026

What is CVE-2026-5052?

The PKI engine in HashiCorp Vault has a vulnerability where the ACME validation process fails to correctly reject local targets when issuing http-01 and tls-alpn-01 challenges. This oversight allows the ACME requests to be unintentionally sent to local network targets, which could potentially expose sensitive information to attackers. This vulnerability has been addressed in several versions of Vault, including the Vault Community Edition and Vault Enterprise.

Affected Version(s)

Vault 64 bit 1.15.0 < 2.0.0

Vault Enterprise 64 bit 1.15.0 < 2.0.0

References

https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulne...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.