# CVE-2026-0259: WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)

> Attackers can read sensitive information and delete arbitrary files on WildFire WF-500 appliances running in default non-FIPS mode.

- **Severity:** Medium 5.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:M/U:Amber`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 May 2026
- **Updated:** 13 May 2026
- **Also known as:** GHSA-7g39-pmpc-x999

## What is CVE-2026-0259?

CVE-2026-0259 is a medium-severity path traversal vulnerability in Paloaltonetworks Pan-Os, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An arbitrary File Read and Delete Vulnerability in Palo Alto Networks WildFire® WF-500 and WF-500-B appliances enables users to read sensitive information and delete arbitrary files. This vulnerability affects WF-500 and WF-500-B appliances running in the default non-FIPS configuration mode.

The WildFire Appliance (WF-500, WF-500-B) software update is now available to customers that use the WildFire Appliance (WF-500, WF-500-B) for on-premise sandboxing.

Please note that customers using the WildFire Public cloud service are NOT impacted by this vulnerability.

Weakness: CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-0259?

It affects 1 product.


Products: Paloaltonetworks Pan-Os.

## How do I fix CVE-2026-0259?

No fix has been published for CVE-2026-0259 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0259 being exploited?

There is no known exploitation of CVE-2026-0259 in the wild and no public exploit code.

## Other vulnerabilities in Paloaltonetworks Pan-Os

- [CVE-2024-3400](https://insights.sbomify.com/CVE-2024-3400/): Palo Alto Networks PAN-OS Command Injection (critical 10.0, exploited in the wild)
- [CVE-2020-2021](https://insights.sbomify.com/CVE-2020-2021/): Palo Alto Networks PAN-OS Authentication Bypass (critical 10.0, exploited in the wild)
- [CVE-2017-15944](https://insights.sbomify.com/CVE-2017-15944/): Palo Alto Networks PAN-OS Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2026-0300](https://insights.sbomify.com/CVE-2026-0300/): Palo Alto Networks PAN-OS Out-of-bounds Write (critical 9.3, exploited in the wild)
- [CVE-2024-0012](https://insights.sbomify.com/CVE-2024-0012/): Palo Alto Networks PAN-OS Management Interface Authentication Bypass (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0259 and fix it if it is affected.

What it is: CVE-2026-0259 is a medium-severity path traversal vulnerability in Paloaltonetworks Pan-Os, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-0259 in the wild and no public exploit code.

Affected product: Paloaltonetworks Pan-Os. 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-2026-0259/ (Markdown: https://insights.sbomify.com/CVE-2026-0259/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0259
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0259
- OSV: https://osv.dev/vulnerability/CVE-2026-0259

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0259/
Summaries are generated and may contain mistakes; the official description above is the record.