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Public proof of conceptFix available

CVE-2026-56705

A public proof of concept exists; no exploitation attested.

  • Published2026-08-25
  • WeaknessCWE-73

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-08-2502:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-56705?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-56705?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • vrana adminerother versions: not affected
    Affected
    • < 5.4.3fixed in 5.4.3semver

    Not affected = 5.4.3

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-25

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • adminerUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • adminerUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • adminerUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • adminerUbuntu:26.04:LTSall versions · no fixed version listed
  • adminerUbuntu:24.04:LTSall versions · no fixed version listed
  • adminerUbuntu:22.04:LTSall versions · no fixed version listed
  • adminerDebian:14all versions · fixed in 5.4.3+dfsg-1
  • adminerDebian:13all versions · no fixed version listed

1 more package range on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifiedBoreas37/CVE-2026-56705ChiefYoru/Exploit-CVE-2026-56705
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
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
Published
2026-08-25
Last Modified
2026-10-12
NVD status
Deferred
GitHub Advisory
GHSA-34q8-53jm-qc2r

Frequently asked questions

What is 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.

Is CVE-2026-56705 actively exploited?

A proof-of-concept exploit exists for CVE-2026-56705, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-56705?

CVE-2026-56705 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record