CVE-2026-41587

HIGHNVD 8.68.6
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.7% (50th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
8.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
8.6HIGHmedium confidence
EG Risk
70
EG Risk 70/100

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)
Severity86% × 45%
The EG Score, 8.6 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). 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

May 7, 2026

Last Modified

May 7, 2026

Advisory Details (2)

Auto-updated May 7, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

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
Web page

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 rangeFix by version rangeDependents
ci4-cms-erp/ci4ms0.26.0.0 ... 0.31.6.0 (21 versions)
  • 0.26.0.0 up to 0.31.7.0: fixed in 0.31.7.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 26× 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 98 of 177 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 79 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-10-12 16:08 UTCEG score recompute
  3. 2026-10-11 19:50 UTCEG score recompute
  4. 2026-10-11 17:04 UTCEG score recompute
  5. 2026-10-11 14:30 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-09-30 08:41 UTCOSV refresh
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 73 more
  1. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-09-11 15:23 UTCOSV refresh
  4. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  6. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-08-23 19:39 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  26. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  27. 2026-08-17 12:48 UTCEG score recompute
  28. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  29. 2026-08-16 04:45 UTCEG score recompute
  30. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  31. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  32. 2026-08-14 03:20 UTCEG score recompute
  33. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  34. 2026-08-12 16:55 UTCEG score recompute
  35. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  36. 2026-08-11 15:57 UTCEG score recompute
  37. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  38. 2026-08-11 01:27 UTCEG score recompute
  39. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  40. 2026-08-09 14:51 UTCEG score recompute
  41. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  42. 2026-08-09 02:30 UTCEG score recompute
  43. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  44. 2026-08-08 02:32 UTCEG score recompute
  45. 2026-08-07 01:50 UTCEG score recompute
  46. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  47. 2026-08-05 22:15 UTCEG score recompute
  48. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  49. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  50. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  51. 2026-08-03 19:42 UTCEG score recompute
  52. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  53. 2026-08-02 04:36 UTCEG score recompute
  54. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  55. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  56. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  57. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  58. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  59. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  60. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  61. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  62. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  63. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  64. 2026-07-23 03:11 UTCEG score recompute
  65. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  66. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  67. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  68. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  69. 2026-07-19 02:29 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  70. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  71. 2026-07-16 17:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  72. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  73. 2026-07-15 14:19 UTCOSV refresh

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Frequently asked(5)

What is CVE-2026-41587?
CVE-2026-41587 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-41587 published?
The CVE record for CVE-2026-41587 was published on May 7, 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 May 7, 2026; the record at its source may have been updated since.
Is CVE-2026-41587 actively exploited?
CVE-2026-41587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-41587 is available: update to the fixed version the vendor names in its advisory.

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