CVE-2026-41891: Ci4 cms erp/ci4ms CI4MS Has A Deactivated User Vulnerability

MODERATE
Advisory Identifier: GHSA-5hfv-c864-qcq9
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CWE-613
Published
Advisory Summary

CVE-2026-41891 is a MODERATE ci4ms has a deactivated user vulnerability (CWE-613: Insufficient Session Expiration) affecting Ci4 cms erp/ci4ms libraries in the Packagist ecosystem. The issue involves ci4ms has a deactivated user session bypass (active=0). Remediation is available by upgrading affected packages to version 0.31.8.0.

CVE-2026-41891 at a Glance

CVE Identifier CVE-2026-41891
GHSA Identifier GHSA-5hfv-c864-qcq9
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-613: Insufficient Session Expiration
Affected Product Ci4 cms erp/ci4ms
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-41891

To remediate this vulnerability, upgrade all affected Ci4 cms erp/ci4ms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ci4-cms-erp/ci4ms fixed: 0.31.8.0 
Upgrade ci4-cms-erp/ci4ms to 0.31.8.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for ci4-cms-erp/ci4ms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-41891, inspect your project dependencies for Ci4 cms erp/ci4ms:

inspect dependencies for ci4-cms-erp/ci4ms

Analyze the terminal output to locate any version of Ci4 cms erp/ci4ms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.31.8.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-613: Insufficient Session Expiration, where according to wasc, "insufficient session expiration is when a web site permits an attacker to reuse old session credentials or session ids for authorization.". In Ci4 cms erp/ci4ms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary The auth filter has the deactivated/banned user check commented out. ### Details CodeIgniter Shield's `loggedIn()` re-checks the `status` field (catching `status='banned'`), but does **not** re-check the `active` field for existing sessions. When an admin deactivates a user (`active=0`) after they have already logged in: - Their session cookie remains valid - `auth()->loggedIn()` still returns `true` - The commented-out code is the only mechanism that would have checked `!$user->active` ### Evidence <img width="981" height="654" alt="image" src="https://github.com/user-attachments/assets/6f75d144-5bcf-4a3f-bc35-bb0715c3ed05" /> ### Impact - User deactivation does NOT immediately revoke backend access - Deactivated user retains full access until session expires (default: 7200s) ### Additional note The commented-out block appears to be a deferred placeholder — it was written but disabled from the very first commit that introduced the filter, and has never been active. The later addition of SessionTracker (v0.31.4.0) suggests the dev was aware of the session revocation gap, but account-level deactivation (users.active = 0) remains unenforced. Could you verify if this is intentionally pending or simply forgotten and not documented?.

CVE-2026-41891 Affected Ci4 cms erp/ci4ms Versions

1 component(s)
Fixed Versions:
0.31.8.0
Product / Package Ecosystem Affected Versions Fixed Version
ci4-cms-erp/ci4ms
 Packagist
≥ 0.26.0
< 0.31.8.0
0.31.8.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-5hfv-c864-qcq9
NVD — CVE-2026-41891 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41891
Security Fix Commit FIX COMMIT
https://github.com/ci4-cms-erp/ci4ms/commit/2f38284281ce6b435ea42003951f14109ac2cea7
Ci4 cms erp/ci4ms Source Repository REPOSITORY
https://github.com/ci4-cms-erp/ci4ms
Ci4 cms erp/ci4ms Release RELEASE
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.8.0

Frequently Asked Questions

What is CVE-2026-41891?
CVE-2026-41891 is a security vulnerability in Ci4 cms erp/ci4ms involving CI4MS has a Deactivated User Session Bypass (active=0) under CWE-613: Insufficient Session Expiration.
Which Ci4 cms erp/ci4ms versions are affected?
Affected versions include releases prior to 0.31.8.0 across affected packages: ci4-cms-erp/ci4ms.
What version fixes CVE-2026-41891?
Upgrading to 0.31.8.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ci4-cms-erp/ci4ms affected?
Yes, ci4-cms-erp/ci4ms is affected in releases prior to 0.31.8.0. Upgrade your dependency to 0.31.8.0 or later.
What CWE is associated with CVE-2026-41891?
CVE-2026-41891 is classified under CWE-613: Insufficient Session Expiration (According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.").
How can I check Packagist dependencies for CVE-2026-41891?
Run the dependency tree command: 'inspect dependencies for ci4-cms-erp/ci4ms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5hfv-c864-qcq9",
  "modified" : "2026-05-08T20:14:41Z",
  "published" : "2026-05-04T20:50:55Z",
  "aliases" : [ "CVE-2026-41891" ],
  "summary" : "CI4MS has a Deactivated User Session Bypass (active=0)",
  "details" : "### Summary\nThe auth filter has the deactivated/banned user check commented out. \n\n### Details\nCodeIgniter Shield's `loggedIn()` re-checks the `status` field (catching `status='banned'`), but does **not** re-check the `active` field for existing sessions. When an admin deactivates a user (`active=0`) after they have already logged in:\n- Their session cookie remains valid\n- `auth()->loggedIn()` still returns `true`\n- The commented-out code is the only mechanism that would have checked `!$user->active`\n\n### Evidence\n<img width=\"981\" height=\"654\" alt=\"image\" src=\"https://github.com/user-attachments/assets/6f75d144-5bcf-4a3f-bc35-bb0715c3ed05\" />\n\n\n### Impact\n- User deactivation does NOT immediately revoke backend access\n- Deactivated user retains full access until session expires (default: 7200s)\n\n### Additional note\nThe commented-out block appears to be a deferred placeholder — it was written but disabled from the very first commit that introduced the filter, and has never been active. The later addition of SessionTracker (v0.31.4.0) suggests the dev was aware of the session revocation gap, but account-level deactivation (users.active = 0) remains unenforced. Could you verify if this is intentionally pending or simply forgotten and not documented?.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "ci4-cms-erp/ci4ms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.26.0"
      }, {
        "fixed" : "0.31.8.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.31.7.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-5hfv-c864-qcq9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41891"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ci4-cms-erp/ci4ms/commit/2f38284281ce6b435ea42003951f14109ac2cea7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ci4-cms-erp/ci4ms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.8.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-613" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-04T20:50:55Z",
    "nvd_published_at" : "2026-05-07T04:16:33Z"
  }
}