CVE-2026-56705
Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
CVE-2026-56705- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-73
- Updated
- 2026-11-02
EUVDEUVD-2026-65203
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
EUVD-2026-65203- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-34q8-53jm-qc2r
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string,...
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
GHSA-34q8-53jm-qc2r- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-73
- Updated
- 2026-11-02
NVD
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
CVE-2026-56705- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-73
- Updated
- 2026-11-02
OSV
Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
CVE-2026-56705- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-73
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-56705
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
DEBIAN-CVE-2026-56705- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-56705
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
- Record
UBUNTU-CVE-2026-56705- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
adminerDebian:12 |
All versions, plus listed versions 4.8.1-14.8.1-24.8.1-45.1.0-15.2.1+dfsg-1 Show 12 moreShow less5.3.0+dfsg-15.4.0+dfsg-15.4.1+dfsg-15.4.2+dfsg-15.4.3+dfsg-15.4.4+dfsg-16.0.0-16.0.1-16.0.2-16.1.0-16.1.1-16.1.2-1 |
None known |
adminerDebian:13 |
All versions, plus listed versions 5.2.1+dfsg-15.3.0+dfsg-15.4.0+dfsg-15.4.1+dfsg-15.4.2+dfsg-1 Show 8 moreShow less5.4.3+dfsg-15.4.4+dfsg-16.0.0-16.0.1-16.0.2-16.1.0-16.1.1-16.1.2-1 |
None known |
adminerDebian:14 |
before 5.4.3+dfsg-1, plus listed versions 5.2.1+dfsg-15.3.0+dfsg-15.4.0+dfsg-15.4.1+dfsg-15.4.2+dfsg-1 |
5.4.3+dfsg-1 |
adminerUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 4.2.1-14.2.1-1ubuntu14.2.1-1ubuntu1+esm1 |
None known |
adminerUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 4.3.1-24.5.0-14.6.1-14.6.2-14.6.2-1ubuntu0.1~esm1 |
None known |
adminerUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 4.7.2-14.7.4-14.7.5-14.7.6-14.7.6-1ubuntu0.1~esm1 |
None known |
adminerUbuntu:22.04:LTS |
All versions, plus listed versions 4.7.9-24.8.1-1 |
None known |
adminerUbuntu:24.04:LTS |
All versions, plus listed versions 4.8.1-14.8.1-1ubuntu14.8.1-2 |
None known |
adminerUbuntu:26.04:LTS |
All versions, plus listed versions 5.2.1+dfsg-15.3.0+dfsg-15.4.0+dfsg-15.4.1+dfsg-1 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Boreas37/CVE-2026-56705 | 2026-08-25 |
| PoC in GitHub | ChiefYoru/Exploit-CVE-2026-56705 | 2026-08-26 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-56705 is a critical vulnerability (CVSS 9.3) in Vrana Adminer, published August 25, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.90%, the 59th percentile. Fixed in adminer 5.4.3+dfsg-1.
References
github.com/vrana/adminer/security/advisories/GHSA-r4x9-5m63-3vxw
vulncheck.com/advisories/adminer-before-remote-code-execution-via-mssql-pdo-dsn-injection
nvd.nist.gov/vuln/detail/CVE-2026-56705
security-tracker.debian.org/tracker/CVE-2026-56705
ubuntu.com/security/CVE-2026-56705
cve.org/CVERecord?id=CVE-2026-56705