CVE-2026-5052
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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Hashicorp Vault
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- hashicorp vault1.19.16, 2.0.0, 1.20.10, 1.21.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| hashicorp vault | 1.14.0 ≤ v < 1.19.16, 1.14.0 ≤ v < 2.0.0, 1.20.0 ≤ v < 1.20.10, 1.21.0 ≤ v < 1.21.5 | 1.19.16, 2.0.0, 1.20.10, 1.21.5 |
| github.com/hashicorp/vaultGo | 1.14.0 ≤ v ≤ 1.21.4, 1.14.0 ≤ v | — |
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