# CVE-2026-0310: PAN-OS: Buffer Overflow Vulnerability via XML Processing

> Unauthenticated attackers can cause denial of service or execute arbitrary code with root privileges via XML processing flaws in PAN-OS firewalls.

- **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-hwvp-gh82-wq29

## What is CVE-2026-0310?

CVE-2026-0310 is a high-severity memory corruption vulnerability in Palo Alto Networks Cloud NGFW, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A buffer overflow vulnerability in the XML processing functionality of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to the management web or dataplane interface to cause a denial of service (DoS) condition on VM-Series firewalls or execute arbitrary code with root privileges on the PA-Series firewalls.

The security risk posed by this issue is minimized when the management interface is restricted to only trusted internal IP addresses according to our recommended  best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . 

Panorama is impacted by this vulnerability.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2026-0310?


## How do I fix CVE-2026-0310?

No fix has been published for CVE-2026-0310 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0310 being exploited?

There is no known exploitation of CVE-2026-0310 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0310 and fix it if it is affected.

What it is: CVE-2026-0310 is a high-severity memory corruption vulnerability in Palo Alto Networks Cloud NGFW, published on 10 Sep 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-2026-0310 in the wild and no public exploit code.

Affected product: Palo Alto Networks Cloud NGFW. 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-2026-0310/ (Markdown: https://insights.sbomify.com/CVE-2026-0310/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0310
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0310
- OSV: https://osv.dev/vulnerability/CVE-2026-0310

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0310/
Summaries are generated and may contain mistakes; the official description above is the record.