5.3
Medium
CVE-2026-5052 Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Vault 1.15 | 1.15.0 → < 2.0.0 | 2.0.0 |
| Vault Enterprise 1.15 | 1.15.0 → < 2.0.0 | 2.0.0 |
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