CVE-2026-53906

HIGHNVD 8.28.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
8.2EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.2Exploit: None knownExposed services: Not assessed

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

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
8.2HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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 (value × EchelonGraph’s weight)
Severity82% × 45%
The EG Score, 8.2 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 1, 2026

Last Modified

July 6, 2026

Advisory Details (2)

Auto-updated Jul 3, 2026
No fix on record yet.
Web page

MyComplianceOffice | Compliance Management Software

https://mco.mycomplianceoffice.com/
Web page

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 11× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 240 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 140 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:40 UTCEG score recompute
  2. 2026-10-11 16:55 UTCEG score recompute
  3. 2026-10-11 14:18 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-09-23 06:56 UTCEG score recompute
  23. 2026-09-23 06:56 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  24. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
Show 75 more
  1. 2026-09-18 06:37 UTCEG score recompute
  2. 2026-09-18 06:37 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  3. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-09-14 00:26 UTCEG score recompute
  7. 2026-09-14 00:26 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  8. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-09-13 09:09 UTCEG score recompute
  10. 2026-09-13 09:09 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  11. 2026-09-12 14:50 UTCEG score recompute
  12. 2026-09-12 14:50 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  13. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-09-06 14:37 UTCEG score recompute
  18. 2026-09-06 14:37 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  19. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-09-06 02:36 UTCEG score recompute
  21. 2026-09-06 02:36 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  22. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  26. 2026-08-31 01:15 UTCEG score recompute
  27. 2026-08-31 01:15 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  28. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  29. 2026-08-30 13:14 UTCEG score recompute
  30. 2026-08-30 13:14 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  31. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  32. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  33. 2026-08-27 22:28 UTCEG score recompute
  34. 2026-08-27 22:28 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  35. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  36. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  37. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  38. 2026-08-24 23:02 UTCEG score recompute
  39. 2026-08-24 23:01 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  40. 2026-08-24 10:57 UTCEG score recompute
  41. 2026-08-24 10:56 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  42. 2026-08-23 20:26 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  43. 2026-08-23 08:25 UTCEG score recompute
  44. 2026-08-23 08:25 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  46. 2026-08-22 20:05 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  47. 2026-08-22 07:25 UTCEG score recompute
  48. 2026-08-22 07:25 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  50. 2026-08-21 17:17 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  51. 2026-08-21 04:57 UTCEG score recompute
  52. 2026-08-21 04:57 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  53. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  54. 2026-08-20 16:55 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  55. 2026-08-20 04:48 UTCEG score recompute
  56. 2026-08-20 04:48 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  57. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  58. 2026-08-19 09:56 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  59. 2026-08-18 21:01 UTCEG score recompute
  60. 2026-08-18 21:01 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  61. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  62. 2026-08-17 23:33 UTCEG score recompute
  63. 2026-08-17 23:33 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  64. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  65. 2026-08-17 10:36 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  66. 2026-08-16 22:35 UTCEG score recompute
  67. 2026-08-16 22:35 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  69. 2026-08-16 10:33 UTCEG score recompute
  70. 2026-08-16 10:33 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  71. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  72. 2026-08-15 22:32 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  73. 2026-08-15 10:30 UTCEG score recompute
  74. 2026-08-15 10:30 UTCGHSA enrichmentGHSA-qwcf-5293-mm28 · GitHub CVSS 8.2
  75. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 26th percentile

Frequently asked(5)

What is CVE-2026-53906?
CVE-2026-53906 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-53906 published?
The CVE record for CVE-2026-53906 was published on July 1, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 6, 2026; the record at its source may have been updated since.
Is CVE-2026-53906 actively exploited?
CVE-2026-53906 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-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?
No fix for CVE-2026-53906 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-53906 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-53906

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