CVE-2026-53906

HIGHNVD 8.28.2
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory published 2026-07-01. NVD baseline CVSS 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.2Exploit: None knownExposed: 0

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

MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages.

Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

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
Severity82% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 6, 2026

Advisory Details (2)

Auto-updated Jul 3, 2026
No patch confirmed yet.
generic

MyComplianceOffice | Compliance Management Software

https://mco.mycomplianceoffice.com/
generic

Vulnerabilities in MyComplianceOffice MCO software | CERT Polska

https://cert.pl/en/posts/2026/07/CVE-2026-53902

Vendor Advisories for CVE-2026-53906(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 108× 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 180 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53906?
CVE-2026-53906 is a high vulnerability published on July 1, 2026. MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages. Because…
When was CVE-2026-53906 disclosed?
CVE-2026-53906 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53906 actively exploited?
CVE-2026-53906 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.1% of all scored CVEs.
What is the CVSS score of CVE-2026-53906?
CVE-2026-53906 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-53906?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53906, 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

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