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…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (5.9th 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

discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-f…

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.