CVE-2026-56705

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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: 0.9%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA SSVC

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%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.9%
EPSS %ILE
58th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 25, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Oct 7, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 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 rangeFix by version rangeDependents
adminer4.8.1-1 ... 6.1.0-1 (15 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
adminer5.2.1+dfsg-1 ... 6.1.0-1 (11 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
adminer5.2.1+dfsg-1, 5.3.0+dfsg-1, 5.4.0+dfsg-1, 5.4.1+dfsg-1, 5.4.2+dfsg-1
  • every version up to 5.4.3+dfsg-1: fixed in 5.4.3+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 37× in last 7d / 203× 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 340 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

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 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 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56705?
CVE-2026-56705 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56705?
A fix for CVE-2026-56705 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56705 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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