CVE-2026-39393

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.4% (32nd 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
Trending — 3 sources updated this weekElevated
8.1EG
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: 0.4%CVSS: 8.1Exploit: 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. Prior to 0.31.4.0, the install route guard in ci4ms relies solely on a volatile cache check (cache('settings')) combined with .env file existence to block post-installation access to the setup wizard. When the database is temporarily unreachable during a cache miss (TTL expiry or admin-triggered cache clear), the guard fails open, allowing an unauthenticated attacker to overwrite the .env file with attacker-controlled database credentials, achieving full application takeover. This vulnerability is fixed in 0.31.4.0.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (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 no (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
0.4%
EPSS %ILE
32nd
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 no (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)14 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 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

April 8, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jun 10, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Post-Installation Re-entry via Cache-Dependent Install Guard Bypass in ci4ms · Advisory · ci4-cms-erp/ci4ms · GitHub

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-8rh5-4mvx-xj7j

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
ci4-cms-erp/ci4ms0.21.0 ... 0.31.3.0 (51 versions)
  • every version up to 0.31.4.0: fixed in 0.31.4.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 29× 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 95 of 180 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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 85 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 0.4% · 32nd percentile
  2. 2026-10-12 16:10 UTCEG score recompute
  3. 2026-10-11 19:52 UTCEG score recompute
  4. 2026-10-11 17:06 UTCEG score recompute
  5. 2026-10-11 14:32 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-10 21:33 UTCOSV refresh
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-09-21 09:19 UTCOSV refresh
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 70 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  12. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-09-02 07:44 UTCOSV refresh
  15. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  26. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  27. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  28. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  29. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  30. 2026-08-16 07:20 UTCEG score recompute
  31. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  32. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  33. 2026-08-14 05:16 UTCEG score recompute
  34. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  35. 2026-08-12 19:32 UTCEG score recompute
  36. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  37. 2026-08-11 19:46 UTCEG score recompute
  38. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  39. 2026-08-11 03:07 UTCEG score recompute
  40. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  41. 2026-08-09 17:38 UTCEG score recompute
  42. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  43. 2026-08-09 04:45 UTCEG score recompute
  44. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  45. 2026-08-08 03:35 UTCEG score recompute
  46. 2026-08-07 14:42 UTCEG score recompute
  47. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  48. 2026-08-05 23:51 UTCEG score recompute
  49. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  50. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  51. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  52. 2026-08-03 22:08 UTCEG score recompute
  53. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  54. 2026-08-02 14:06 UTCEG score recompute
  55. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  56. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  57. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  58. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  59. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  60. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  61. 2026-07-26 08:47 UTCEG score recompute
  62. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  63. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  64. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  65. 2026-07-23 03:10 UTCEG score recompute
  66. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  67. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  68. 2026-07-20 22:02 UTCOSV refresh
  69. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  70. 2026-07-19 02:29 UTCEPSS rescoreEPSS 0.4% · 34th percentile

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Frequently asked(5)

What is CVE-2026-39393?
CVE-2026-39393 is a high-severity vulnerability; its CVE record was published on April 8, 2026. CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the install route guard in ci4ms relies solely on a volatile cache check (cache('settings')) combined with .env file existence to block…
When was the CVE record for CVE-2026-39393 published?
The CVE record for CVE-2026-39393 was published on April 8, 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 24, 2026; the record at its source may have been updated since.
Is CVE-2026-39393 actively exploited?
CVE-2026-39393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-39393?
CVE-2026-39393 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-39393?
A fix for CVE-2026-39393 is available: update to the fixed version the vendor names in its advisory.

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