CVE-2026-52203

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

An issue in MCMS v.6.1.1 allows a remote attacker to obtain sensitive information via the source parameter.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jul 20, 2026
No patch confirmed yet.
generic

CVE-2026-52203 · GitHub

https://gist.github.com/this1slwl/1bfb6996ca7edf6f5d15b5ebc181f337

Vendor Advisories for CVE-2026-52203(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 112× 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 153 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-52203?
CVE-2026-52203 is a high vulnerability published on July 17, 2026. An issue in MCMS v.6.1.1 allows a remote attacker to obtain sensitive information via the source parameter.
When was CVE-2026-52203 disclosed?
CVE-2026-52203 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52203 actively exploited?
CVE-2026-52203 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 58.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52203?
CVE-2026-52203 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-52203?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52203, 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.

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