CVE-2026-5052— Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS
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I. Basic Information for CVE-2026-5052
Vulnerability Information
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Vulnerability Title
Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
HashiCorp Vault和HashiCorp Vault Enterprise 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HashiCorp Vault和HashiCorp Vault Enterprise都是美国HashiCorp公司的产品。HashiCorp Vault是一款私钥访问管理工具。HashiCorp Vault Enterprise是一个企业信息归档平台。 HashiCorp Vault 2.0.0之前版本、HashiCorp Vault Enterprise 2.0.0之前版本、1.21.5之前版本、1.20.10之前版本和1.19.16之前版本存在安全漏洞，该漏洞源于PKI引擎的ACME验证未拒绝本地目标
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| HashiCorp | Vault | 1.15.0 ~ 2.0.0 | - | |
| HashiCorp | Vault Enterprise | 1.15.0 ~ 2.0.0 | - |
II. Public POCs for CVE-2026-5052
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · HashiCorp · 2026-04-17 · 4 CVEs total
| CVE-2026-3605 | 8.1 HIGH | Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial-of-Service |
| CVE-2026-4525 | 7.5 HIGH | Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header |
| CVE-2026-5807 | 7.5 HIGH | Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Oper |
IV. Related Vulnerabilities
Same product: Vault
- CVE-2026-5807
Vault Vulnerable to Denial-of-Service via Unauthenticated Ro - CVE-2026-4525
Vault Token Leaked to Backends via Authorization: Bearer Pas - CVE-2026-3605
Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial - CVE-2025-12044
Vault Vulnerable to Denial of Service Due to Rate Limit Regr - CVE-2025-11621
Vault AWS auth method bypass due to AWS client cache
Same vendor: HashiCorp
- CVE-2026-7776
Boundary Workers Vulnerable to Denial of Service During TLS - CVE-2026-5807
Vault Vulnerable to Denial-of-Service via Unauthenticated Ro - CVE-2026-4525
Vault Token Leaked to Backends via Authorization: Bearer Pas - CVE-2026-3605
Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial - CVE-2026-4660
Go-getter may allow to arbitrary filesystem reads through gi
Same weakness: CWE-918
- CVE-2026-8193
Akaunting Invoice PDF Rendering dompdf.php server-side reque - CVE-2026-44313
LinkWarden: Server-Side Request Forgery (SSRF) in Link Creat - CVE-2026-42352
pygeoapi 0.23.x: Unauthenticated SSRF via OGC API - Processe - CVE-2026-42346
Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validatio - CVE-2026-42339
New API: SSRF Filter Bypass via 0.0.0.0
V. Comments for CVE-2026-5052
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