CVE-2026-56705

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-25. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unauthenticated RCE via MSSQL PDO DSN Injection · Advisory · vrana/adminer · GitHub

https://github.com/vrana/adminer/security/advisories/GHSA-r4x9-5m63-3vxw
generic

Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection | Advisories | VulnCheck

https://www.vulncheck.com/advisories/adminer-before-remote-code-execution-via-mssql-pdo-dsn-injection

Vendor Advisories for CVE-2026-56705(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-26 11:10 UTCEG score recompute
  2. 2026-08-26 11:10 UTCGHSA enrichment
  3. 2026-08-26 07:23 UTCGHSA enrichment
  4. 2026-08-26 03:39 UTCGHSA enrichment
  5. 2026-08-25 23:54 UTCGHSA enrichment
  6. 2026-08-25 20:09 UTCEG score recompute
  7. 2026-08-25 20:09 UTCGHSA enrichment
  8. 2026-08-25 16:25 UTCEG score recompute
  9. 2026-08-25 16:24 UTCGHSA enrichment
  10. 2026-08-25 15:50 UTCEG score recompute
  11. 2026-08-25 15:50 UTCGHSA enrichment
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-25 13:33 UTCGHSA enrichment
  14. 2026-08-25 09:48 UTCGHSA enrichment
  15. 2026-08-25 06:04 UTCEG score recompute
  16. 2026-08-25 06:04 UTCGHSA enrichment
  17. 2026-08-25 02:19 UTCEG score recompute
  18. 2026-08-25 01:50 UTCEG score recompute
  19. 2026-08-25 01:50 UTCMITRE cvelistV5first tracked

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCBoreas37/CVE-2026-56705
    First seen Aug 25, 2026

    CVE-2026-56705 - Adminer < 5.4.3 unauthenticated RCE via MSSQL PDO DSN injection (ODBC TraceFile arbitrary file write). PoC, Docker lab and negative test included.

    Open source ↗

Frequently asked(5)

What is CVE-2026-56705?
CVE-2026-56705 is a critical vulnerability published on August 25, 2026. 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…
When was CVE-2026-56705 disclosed?
CVE-2026-56705 was first published in the National Vulnerability Database on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56705 actively exploited?
CVE-2026-56705 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 59.6% of all scored CVEs.
What is the CVSS score of CVE-2026-56705?
CVE-2026-56705 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-56705?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56705, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-56705

Explore →

Is Your Infrastructure Affected by CVE-2026-56705?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs