# CVE-2024-26015: Security feature bypass in FortiOS

> Unauthenticated attackers can bypass IP blocklists in FortiProxy and FortiOS due to incorrect number parsing, allowing unauthorized access.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N/E:F/RL:W/RC:R`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jul 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-28x5-qjqx-j9fr

## What is CVE-2024-26015?

CVE-2024-26015 is a low-severity vulnerability in Fortinet Fortios, published on 9 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An incorrect parsing of numbers with different radices vulnerability [CWE-1389] in FortiProxy version 7.4.3 and below, version 7.2.10 and below, version 7.0.17 and below and FortiOS version 7.4.3 and below, version 7.2.8 and below, version 7.0.15 and below IP address validation feature may permit an unauthenticated attacker to bypass the IP blocklist via crafted requests.

Weakness: CWE-704 (Incorrect Type Conversion or Cast), CWE-1389 (Incorrect Parsing of Numbers with Different Radices)

## Which versions are affected by CVE-2024-26015?

It affects 2 products.


Products: Fortinet Fortios, Fortinet Fortiproxy.

## How do I fix CVE-2024-26015?

No fix has been published for CVE-2024-26015 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-26015 being exploited?

There is no known exploitation of CVE-2024-26015 in the wild and no public exploit code.

## Other vulnerabilities in Fortinet Fortios

- [CVE-2024-23113](https://insights.sbomify.com/CVE-2024-23113/): Fortinet Multiple Products Format String (critical 9.8, exploited in the wild)
- [CVE-2022-40684](https://insights.sbomify.com/CVE-2022-40684/): Fortinet Multiple Products Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2024-55591](https://insights.sbomify.com/CVE-2024-55591/): Fortinet FortiOS and FortiProxy Authentication Bypass (critical 9.6, exploited in the wild)
- [CVE-2024-21762](https://insights.sbomify.com/CVE-2024-21762/): Fortinet FortiOS Out-of-Bound Write (critical 9.6, exploited in the wild)
- [CVE-2022-42475](https://insights.sbomify.com/CVE-2022-42475/): Fortinet FortiOS Heap-Based Buffer Overflow (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-26015 and fix it if it is affected.

What it is: CVE-2024-26015 is a low-severity vulnerability in Fortinet Fortios, published on 9 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-26015 in the wild and no public exploit code.

Affected product: Fortinet Fortios. 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-2024-26015/ (Markdown: https://insights.sbomify.com/CVE-2024-26015/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-26015
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-26015
- OSV: https://osv.dev/vulnerability/CVE-2024-26015

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-26015/
Summaries are generated and may contain mistakes; the official description above is the record.