CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to immediately revoke active user sessions when an account is deleted. Due to a logic flaw in the backend design, account state changes are enforced only during authentication (login), not for already-established sessions. The system implicitly assumes that authenticated users remain trusted for the lifetime of their session. There is no session expiration or account expiration mechanism in place, causing deleted accounts to retain indefinite access until the user manually logs out. This behavior breaks the intended access control policy and results in persistent unauthorized access. This issue has been patched in version 0.31.0.0.
CVE-2026-34570
HIGHNVD 8.88.8—Elevated
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 87% 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
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EPSS
- 39.4%
- KEV
- Not listed
Published
April 1, 2026
Last Modified
April 6, 2026
Advisory Details (2)
Auto-updated May 23, 2026Patch available. Sources: github.
github Patch Available
Account Deletion Module Full Persistent Unauthorized Access for All‑Roles via Improper Session Invalidation (Logic Flaw) · Advisory · ci4-cms-erp/ci4ms · GitHub
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-4vxv-4xq4-p84hgeneric
Release v0.31.0.0 - Major Security & Framework Update (CI 4.7.1 & Shield Integration) · ci4-cms-erp/ci4ms · GitHub
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| ci4-cms-erp/ci4ms | 0.21.0 ... 0.28.6.0 (47 versions) | 0.31.0.0 | — |
Frequently asked(5)
What is CVE-2026-34570?
CVE-2026-34570 is a high vulnerability published on April 1, 2026. CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to immediately revoke active user sessions when an account is deleted. Due to a logic flaw in the backend…
When was CVE-2026-34570 disclosed?
CVE-2026-34570 was first published in the National Vulnerability Database on April 1, 2026, with the most recent update on April 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34570 actively exploited?
CVE-2026-34570 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-2026-34570?
CVE-2026-34570 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-34570?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34570, 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.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-34570
Is Your Infrastructure Affected by CVE-2026-34570?
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