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  4. CVE 2026 56704 adminer before 543 cross site scripting via mysql
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-56704

Adminer before 5.4.3 Cross-Site Scripting via MySQL Version StringCVE-2026-56704

Answer in brief

CVE-2026-56704 records a Medium severity (CVSS 5.3) vulnerability in Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String. The current sources do not mark it as known exploited. The current feed maps vrana/adminer (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 25, 2026Updated Sep 8, 2026Source checked Oct 9, 2026First seen by HOL Aug 25, 2026Material review Sep 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps vrana/adminer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
vrana/adminergeneric>=0 <5.4.35.4.3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for vrana/adminer.
  2. 2Review the reported fix. Update vrana/adminer to 5.4.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 25, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Adminer before 5.4.3 inserts unsanitized database server version strings into script tags with valid CSP nonces without proper validation. Attackers controlling a rogue MySQL server can return crafted version strings that break out of the JavaScript context and execute arbitrary code, bypassing Content Security Policy protections.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Keycloak-services: keycloak-services: stored xss on login page via kcsanitize bypassAlso CWE-79
  • Reset context tracking on consecutive template expressions in html/templateAlso CWE-79
  • Recognize yield as regexp preceder keyword in html/templateAlso CWE-79
  • Unauthenticated JSON API Authorization Bypass Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Unauthenticated RTSP Tunnel Denial-of-Service Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Predictable Media Stream Pre-Shared Key Vulnerability in TP-Link Tapo C325WBSame generic ecosystem

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 9, 2026
References
2 linked sources
Open source record