What is CVE-2026-5052?

CVE-2026-5052 is a medium-severity vulnerability in Hashicorp Vault, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-04-17.

How severe is CVE-2026-5052?

Medium severity. CVSS v3 base score is 5.3 out of 10.

SSRF in Hashicorp Vault

CVE-2026-5052

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.003 (25.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Hashicorp Vault — versions 1.15.0
Hashicorp Vault Enterprise — versions 1.15.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security@hashicorp.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-5052?: CVE-2026-5052 is a medium-severity vulnerability in Hashicorp Vault, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-04-17.
How severe is CVE-2026-5052?: Medium severity. CVSS v3 base score is 5.3 out of 10.