CVE-2026-41587

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.6Exploit: NoneExposed: 0

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

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0.0 to before version 0.31.7.0, a theme upload feature allows any authenticated backend user with theme-upload permission to achieve remote code execution (RCE) by uploading a crafted ZIP file. PHP files inside the ZIP are installed into the web-accessible public/ directory with no extension or content filtering, making them directly executable via HTTP. This issue has been patched in version 0.31.7.0.

CVSS v3
8.6
EG Score
8.6(medium)
EPSS
39.4%
KEV
Not listed

Published

May 7, 2026

Last Modified

May 7, 2026

Advisory Details (2)

Auto-updated May 7, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution · Advisory · ci4-cms-erp/ci4ms · GitHub

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fw49-9xq4-gmx6
generic

Merge commit from fork · ci4-cms-erp/ci4ms@b969465 · GitHub

https://github.com/ci4-cms-erp/ci4ms/commit/b969465e71eacd9eb57014ad1fce1fc34fa7bca0

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
ci4-cms-erp/ci4ms0.26.0.0 ... 0.31.6.0 (21 versions)0.31.7.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 41× 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 102 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
  4. 2026-07-07 13:46 UTCEPSS rescore
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  16. 2026-06-27 14:44 UTCEG score recompute
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  18. 2026-06-26 22:30 UTCEG score recompute
  19. 2026-06-25 13:49 UTCEPSS rescore
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  1. 2026-06-21 14:56 UTCEPSS rescore
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  3. 2026-06-19 19:25 UTCEPSS rescore
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  8. 2026-06-15 17:49 UTCEPSS rescore
  9. 2026-06-15 08:05 UTCEG score recompute
  10. 2026-06-14 19:34 UTCEG score recompute
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  12. 2026-06-13 23:00 UTCEPSS rescore
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  15. 2026-06-12 22:00 UTCEG score recompute
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  17. 2026-06-11 14:00 UTCEPSS rescore
  18. 2026-06-11 13:18 UTCEG score recompute
  19. 2026-06-11 00:54 UTCEG score recompute
  20. 2026-06-10 22:18 UTCEPSS rescore
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  23. 2026-06-10 11:17 UTCEG score recompute
  24. 2026-06-09 22:56 UTCEG score recompute
  25. 2026-06-09 10:23 UTCEG score recompute
  26. 2026-06-08 22:02 UTCEG score recompute
  27. 2026-06-08 14:17 UTCEPSS rescore
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  29. 2026-06-08 03:23 UTCEG score recompute
  30. 2026-06-07 15:25 UTCEPSS rescore
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  32. 2026-06-07 15:02 UTCEG score recompute
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  35. 2026-06-06 13:47 UTCEPSS rescore
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  37. 2026-06-06 01:57 UTCEG score recompute
  38. 2026-06-05 22:47 UTCEPSS rescore
  39. 2026-06-05 13:22 UTCEG score recompute
  40. 2026-06-05 06:10 UTCEPSS rescore
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  42. 2026-06-05 00:57 UTCEG score recompute
  43. 2026-06-04 13:12 UTCEPSS rescore
  44. 2026-06-04 13:12 UTCEPSS rescore
  45. 2026-06-04 11:25 UTCEG score recompute
  46. 2026-06-03 23:03 UTCEG score recompute
  47. 2026-06-03 10:40 UTCEG score recompute
  48. 2026-06-02 22:19 UTCEG score recompute
  49. 2026-06-02 20:13 UTCEPSS rescore
  50. 2026-06-02 09:57 UTCEG score recompute
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  52. 2026-06-01 13:52 UTCEPSS rescore
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  55. 2026-06-01 09:14 UTCEG score recompute
  56. 2026-05-31 22:30 UTCEPSS rescore
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  66. 2026-05-27 13:40 UTCEPSS rescore
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  68. 2026-05-27 13:40 UTCEPSS rescore
  69. 2026-05-26 13:44 UTCEPSS rescore
  70. 2026-05-26 07:18 UTCEPSS rescore
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  72. 2026-05-23 00:08 UTCEG score recompute
  73. 2026-05-20 22:38 UTCEPSS rescore
  74. 2026-05-20 22:38 UTCEPSS rescore
  75. 2026-05-20 13:59 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41587?
CVE-2026-41587 is a high vulnerability published on May 7, 2026. CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0.0 to before version 0.31.7.0, a theme upload feature allows any authenticated backend user with theme-upload permission to achieve remote…
When was CVE-2026-41587 disclosed?
CVE-2026-41587 was first published in the National Vulnerability Database on May 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41587 actively exploited?
CVE-2026-41587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41587?
CVE-2026-41587 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-41587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41587, 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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