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CVE-2026-56703— Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO

Quick assessment

Affected
vrana adminer
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Adminer 5.4.3 之前的版本在 SQLite 查询处理中存在远程代码执行漏洞。尽管已对 ATTACH 命令进行了限制，但 VACUUM INTO 并未被阻止。已认证的攻击者可以利用 VACUUM INTO 将 PHP 代码写入任意文件路径，从而在服务器上执行任意命令。

CVSS 7.2 · High EPSS 1.13% · P64

Affected Version Matrix 2

VendorProduct Version RangeStatus
vrana adminer < 5.4.3 affected
5.4.3 unaffected
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I. Basic Information for CVE-2026-56703

Vulnerability Information
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Vulnerability Title
Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO
Source: CVE Program / CVE List V5
Vulnerability Description
Adminer before 5.4.3 contains a remote code execution vulnerability in SQLite query handling where VACUUM INTO is not blocked despite ATTACH restrictions. Authenticated attackers can execute VACUUM INTO to write PHP code to arbitrary file paths and execute commands on the server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vrana adminer 0 ~ 5.4.3 -

II. Public POCs for CVE-2026-56703

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8395 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-56703

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Vendor Advisories for CVE-2026-56703 (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-2026-56706 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-2026-34964 5.8 MEDIUM Adminer before 5.5.0 SSRF via PDO DSN Injection
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-94

V. Comments for CVE-2026-56703

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