# CVE-2026-4320: Authorization Bypass in ICMS Content Management by Creartia Internet Consulting

> Attackers can bypass authentication and escalate privileges by manipulating HTTP redirect headers during login in ICMS Content Management.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 May 2026
- **Updated:** 18 May 2026
- **Also known as:** GHSA-gg2r-86qc-9w57

## What is CVE-2026-4320?

CVE-2026-4320 is a critical authentication bypass vulnerability in Creartia Internet Consulting ICMS Content Management, published on 18 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Authorization Bypass vulnerability in Creartia's ICMS software could allow an attacker to gain unauthorized access to protected features by manipulating the HTTP redirect headers of the login process, causing the script to continue running and enabling privilege escalation without the need for credentials.

Weakness: CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2026-4320?


## How do I fix CVE-2026-4320?

No fix has been published for CVE-2026-4320 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4320 being exploited?

There is no known exploitation of CVE-2026-4320 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4320 and fix it if it is affected.

What it is: CVE-2026-4320 is a critical authentication bypass vulnerability in Creartia Internet Consulting ICMS Content Management, published on 18 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-4320 in the wild and no public exploit code.

Affected product: Creartia Internet Consulting ICMS Content Management. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-4320/ (Markdown: https://insights.sbomify.com/CVE-2026-4320/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4320
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4320
- OSV: https://osv.dev/vulnerability/CVE-2026-4320

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4320/
Summaries are generated and may contain mistakes; the official description above is the record.