CVE-2026-56703Public exploitNetwork attack vector

Authenticated command execution via SQLite VACUUM INTO

Published Aug 25, 2026 · Updated Aug 25, 2026

Code injection in Adminer before 5.4.3 allows remote authenticated users to execute server commands through crafted SQLite queries. In sql.inc.php, the SQLite query filter blocks ATTACH but passes VACUUM INTO, which writes attacker-controlled database bytes to an arbitrary PHP path. Exploitation requires the SQLite driver and a valid Adminer database session; the resulting web shell runs commands with the web server's privileges.

CVSS severity8.6
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Adminer before 5.4.3 allows remote authenticated users to execute server commands through crafted SQLite queries. In sql.inc.php, the SQLite query filter blocks ATTACH but passes VACUUM INTO, which writes attacker-controlled database bytes to an arbitrary PHP path. Exploitation requires the SQLite driver and a valid Adminer database session; the resulting web shell runs commands with the web server's privileges.

The record

CVE
CVE-2026-56703
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Adminer
Product
Adminer
Classifications
CWE-184, CWE-94, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Adminer · Adminerversion=0 <5.4.3

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
CWE-94Improper Control of Generation of Code ('Code Injection')
T1505.003Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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