CVE-2026-5052

Published: Apr 17, 2026

Modified: Apr 17, 2026

PUBLISHED

CVSS v3.1

5.3

MEDIUM

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.

Vendor	Product	Versions
HashiCorp	Vault	affected `1.15.0 - < 2.0.0`
HashiCorp	Vault Enterprise	affected `1.15.0 - < 2.0.0`

Weaknesses (CWE)

CWE-918

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

References

https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343

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CVE-2026-5052

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References