CVE-2026-31272

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-07. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

MRCMS 3.1.2 contains an access control vulnerability. The save() method in src/main/java/org/marker/mushroom/controller/UserController.java lacks proper authorization validation, enabling direct addition of super administrator accounts without authentication.

CVSS v3
9.8
EG Score
9.8(medium)
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
1%
EPSS %ILE
46%
KEV
Not listed

Published

April 7, 2026

Last Modified

April 14, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Vul/MRCMS/Unauthorized.md at main · clockw1se0v0/Vul · GitHub

https://github.com/clockw1se0v0/Vul/blob/main/MRCMS/Unauthorized.md

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 30× 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 240 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31272?
CVE-2026-31272 is a critical vulnerability published on April 7, 2026. MRCMS 3.1.2 contains an access control vulnerability. The save() method in src/main/java/org/marker/mushroom/controller/UserController.java lacks proper authorization validation, enabling direct addition of super administrator accounts without authentication.
When was CVE-2026-31272 disclosed?
CVE-2026-31272 was first published in the National Vulnerability Database on April 7, 2026, with the most recent update on April 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31272 actively exploited?
CVE-2026-31272 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 54.2% of all scored CVEs.
What is the CVSS score of CVE-2026-31272?
CVE-2026-31272 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-31272?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31272, 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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