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CVE-2026-34964— Adminer before 5.5.0 SSRF via PDO DSN Injection

Quick assessment

Affected
vrana adminer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jakub Vrána Adminer是Jakub Vrána个人开发者的一款轻量级的数据库管理工具。 Jakub Vrána Adminer 5.5.0之前版本存在服务端请求伪造漏洞，该漏洞源于登录表单的服务器字段验证器仅检查特权端口的前导整数，未能拒绝非数字端口值，攻击者可通过注入PDO DSN键绕过特权端口限制，在认证前建立到任意内部主机和端口的TCP连接，容易受到服务端请求伪造攻击。

CVSS 5.8 · Medium EPSS 0.43% · P36

Affected Version Matrix 2

VendorProduct Version RangeStatus
vrana adminer < 5.5.0 affected
5.5.0 unaffected
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I. Basic Information for CVE-2026-34964

Vulnerability Information
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Vulnerability Title
Adminer before 5.5.0 SSRF via PDO DSN Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Adminer before 5.5.0 contains a server-side request forgery vulnerability in the login form's server field validator, which only inspects leading integers for privileged ports and fails to reject non-numeric port values. Attackers can inject PDO DSN keys like host= and port= into the server parameter to bypass the privileged-port restriction and establish TCP connections to arbitrary internal hosts and ports before authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Jakub Vrána Adminer 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jakub Vrána Adminer是Jakub Vrána个人开发者的一款轻量级的数据库管理工具。 Jakub Vrána Adminer 5.5.0之前版本存在服务端请求伪造漏洞，该漏洞源于登录表单的服务器字段验证器仅检查特权端口的前导整数，未能拒绝非数字端口值，攻击者可通过注入PDO DSN键绕过特权端口限制，在认证前建立到任意内部主机和端口的TCP连接，容易受到服务端请求伪造攻击。
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
vrana adminer 0 ~ 5.5.0 -

II. Public POCs for CVE-2026-34964

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III. Intelligence Information for CVE-2026-34964

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Vendor Advisories for CVE-2026-34964 (2)

Same Patch Batch · vrana · 2026-08-25 · 10 CVEs total

CVE-2026-56705 9.8 CRITICAL Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
CVE-2026-56702 8.8 HIGH Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload
CVE-2026-34968 8.1 HIGH Adminer before 5.4.3 Arbitrary File Deletion via SQLite Drop
CVE-2026-56703 7.2 HIGH Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO
CVE-2026-56706 6.8 MEDIUM Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking
CVE-2026-56704 6.1 MEDIUM Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String
CVE-2026-34967 5.4 MEDIUM Adminer sql-log Plugin 5.3.0 through 5.4.2 Arbitrary File Write
CVE-2026-34959 4.7 MEDIUM Adminer before 5.5.0 Open Redirect via X-Forwarded-Prefix
CVE-2026-16434 2.3 LOW Adminer before 5.5.1 X-Forwarded-Prefix Backslash Bypass

IV. Related Vulnerabilities

Same product: adminer
Same vendor: vrana
Same weakness: CWE-918

V. Comments for CVE-2026-34964

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