# CVE-2026-59839: Path traversal in FortiOS

> Attackers can execute unauthorized code or commands via path traversal in Fortinet FortiOS, FortiPAM, and FortiProxy.

- **Severity:** Medium 5.0 (`CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jul 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-c97x-2x9j-68c3

## What is CVE-2026-59839?

CVE-2026-59839 is a medium-severity path traversal vulnerability in Fortinet Fortios, published on 14 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiPAM 1.8.0, FortiPAM 1.7.0 through 1.7.2, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-59839?

It affects 3 products.


Products: Fortinet Fortios, Fortinet Fortipam, Fortinet Fortiproxy.

## How do I fix CVE-2026-59839?

No fix has been published for CVE-2026-59839 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-59839 being exploited?

There is no known exploitation of CVE-2026-59839 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-2026-59839 and fix it if it is affected.

What it is: CVE-2026-59839 is a medium-severity path traversal vulnerability in Fortinet Fortios, published on 14 Jul 2026. 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-2026-59839 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-2026-59839/ (Markdown: https://insights.sbomify.com/CVE-2026-59839/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59839
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59839
- OSV: https://osv.dev/vulnerability/CVE-2026-59839

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-59839/
Summaries are generated and may contain mistakes; the official description above is the record.