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 — 3 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
42%
KEV
Not listed

Published

August 25, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 16, 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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
adminer4.8.1-1 ... 6.0.1-1 (13 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
adminer5.2.1+dfsg-1 ... 6.0.1-1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
adminer5.2.1+dfsg-1, 5.3.0+dfsg-1, 5.4.0+dfsg-1, 5.4.1+dfsg-1, 5.4.2+dfsg-15.4.3+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 56× in last 7d / 210× 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.

Showing the most recent 100 of 210 total refreshes for this CVE.

  1. 2026-09-19 20:12 UTCGHSA enrichment
  2. 2026-09-19 16:27 UTCEG score recompute
  3. 2026-09-19 16:27 UTCGHSA enrichment
  4. 2026-09-19 12:43 UTCGHSA enrichment
  5. 2026-09-19 08:56 UTCGHSA enrichment
  6. 2026-09-19 05:05 UTCGHSA enrichment
  7. 2026-09-19 01:19 UTCGHSA enrichment
  8. 2026-09-18 21:34 UTCEG score recompute
  9. 2026-09-18 21:34 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 16:23 UTCGHSA enrichment
  12. 2026-09-18 12:11 UTCGHSA enrichment
  13. 2026-09-18 08:25 UTCGHSA enrichment
  14. 2026-09-18 04:40 UTCGHSA enrichment
  15. 2026-09-18 00:56 UTCGHSA enrichment
  16. 2026-09-17 21:11 UTCEG score recompute
  17. 2026-09-17 21:11 UTCGHSA enrichment
  18. 2026-09-17 19:31 UTCEPSS rescore
  19. 2026-09-17 14:38 UTCGHSA enrichment
  20. 2026-09-17 10:52 UTCGHSA enrichment
  21. 2026-09-17 07:07 UTCGHSA enrichment
  22. 2026-09-17 03:22 UTCGHSA enrichment
  23. 2026-09-16 23:13 UTCGHSA enrichment
  24. 2026-09-16 19:28 UTCGHSA enrichment
  25. 2026-09-16 14:15 UTCEG score recompute
Show 75 more
  1. 2026-09-16 14:15 UTCGHSA enrichment
  2. 2026-09-16 14:08 UTCEPSS rescore
  3. 2026-09-16 09:26 UTCEG score recompute
  4. 2026-09-16 09:26 UTCGHSA enrichment
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-16 04:46 UTCGHSA enrichment
  7. 2026-09-16 01:01 UTCGHSA enrichment
  8. 2026-09-15 21:16 UTCGHSA enrichment
  9. 2026-09-15 17:31 UTCGHSA enrichment
  10. 2026-09-15 13:46 UTCGHSA enrichment
  11. 2026-09-15 10:01 UTCGHSA enrichment
  12. 2026-09-15 06:16 UTCEG score recompute
  13. 2026-09-15 06:16 UTCGHSA enrichment
  14. 2026-09-15 03:11 UTCEPSS rescore
  15. 2026-09-15 02:31 UTCGHSA enrichment
  16. 2026-09-14 22:44 UTCGHSA enrichment
  17. 2026-09-14 18:59 UTCGHSA enrichment
  18. 2026-09-14 15:06 UTCGHSA enrichment
  19. 2026-09-14 11:21 UTCGHSA enrichment
  20. 2026-09-14 07:36 UTCGHSA enrichment
  21. 2026-09-14 03:52 UTCGHSA enrichment
  22. 2026-09-14 00:07 UTCGHSA enrichment
  23. 2026-09-13 20:21 UTCEG score recompute
  24. 2026-09-13 20:21 UTCGHSA enrichment
  25. 2026-09-13 16:47 UTCEPSS rescore
  26. 2026-09-13 16:36 UTCGHSA enrichment
  27. 2026-09-13 12:51 UTCGHSA enrichment
  28. 2026-09-13 09:06 UTCGHSA enrichment
  29. 2026-09-13 05:22 UTCGHSA enrichment
  30. 2026-09-13 01:38 UTCGHSA enrichment
  31. 2026-09-12 21:53 UTCGHSA enrichment
  32. 2026-09-12 18:08 UTCEG score recompute
  33. 2026-09-12 18:08 UTCGHSA enrichment
  34. 2026-09-12 14:23 UTCGHSA enrichment
  35. 2026-09-12 10:38 UTCGHSA enrichment
  36. 2026-09-12 06:53 UTCGHSA enrichment
  37. 2026-09-12 03:08 UTCGHSA enrichment
  38. 2026-09-11 23:23 UTCGHSA enrichment
  39. 2026-09-11 19:32 UTCGHSA enrichment
  40. 2026-09-11 15:47 UTCEG score recompute
  41. 2026-09-11 15:47 UTCGHSA enrichment
  42. 2026-09-11 14:53 UTCEPSS rescore
  43. 2026-09-11 12:03 UTCEG score recompute
  44. 2026-09-11 12:02 UTCGHSA enrichment
  45. 2026-09-11 07:44 UTCGHSA enrichment
  46. 2026-09-11 03:58 UTCGHSA enrichment
  47. 2026-09-11 00:14 UTCGHSA enrichment
  48. 2026-09-10 19:37 UTCGHSA enrichment
  49. 2026-09-10 15:52 UTCGHSA enrichment
  50. 2026-09-10 12:08 UTCEG score recompute
  51. 2026-09-10 12:08 UTCGHSA enrichment
  52. 2026-09-10 09:35 UTCEPSS rescore
  53. 2026-09-10 07:56 UTCGHSA enrichment
  54. 2026-09-10 04:11 UTCGHSA enrichment
  55. 2026-09-10 00:23 UTCGHSA enrichment
  56. 2026-09-09 17:03 UTCGHSA enrichment
  57. 2026-09-09 12:52 UTCGHSA enrichment
  58. 2026-09-09 08:50 UTCGHSA enrichment
  59. 2026-09-09 05:05 UTCGHSA enrichment
  60. 2026-09-09 01:19 UTCEG score recompute
  61. 2026-09-09 01:19 UTCGHSA enrichment
  62. 2026-09-08 22:01 UTCEPSS rescore
  63. 2026-09-08 20:52 UTCGHSA enrichment
  64. 2026-09-08 06:56 UTCGHSA enrichment
  65. 2026-09-08 03:10 UTCGHSA enrichment
  66. 2026-09-07 23:25 UTCGHSA enrichment
  67. 2026-09-07 19:37 UTCEG score recompute
  68. 2026-09-07 19:37 UTCGHSA enrichment
  69. 2026-09-07 16:01 UTCEPSS rescore
  70. 2026-09-07 15:52 UTCGHSA enrichment
  71. 2026-09-07 12:07 UTCGHSA enrichment
  72. 2026-09-07 08:14 UTCGHSA enrichment
  73. 2026-09-07 04:30 UTCGHSA enrichment
  74. 2026-09-07 00:40 UTCGHSA enrichment
  75. 2026-09-06 20:56 UTCGHSA enrichment

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, with the most recent update on September 8, 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 58.3% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-56705

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