CVE-2026-5052

Friday, April 17, 2026

5.3

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

Summary

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 Software

Vendor	Product	Version Range	Status
HashiCorp	Vault	`1.15.0 < 2.0.0`	affected
HashiCorp	Vault Enterprise	`1.15.0 < 2.0.0`	affected

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

SSVC:
Exploitation: none
- Automatable: yes
- Technical Impact: partial

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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