# CVE-2026-4308: frdel/agent0ai agent-zero document_query.py handle_pdf_document server-side request forgery

> Remote attackers can exploit a server-side request forgery vulnerability in the agent-zero library to access internal resources or bypass security controls.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 17 Mar 2026
- **Updated:** 17 Mar 2026
- **Also known as:** GHSA-8g9j-3hrr-2hvm

## What is CVE-2026-4308?

CVE-2026-4308 is a medium-severity server-side request forgery vulnerability in agent0ai agent-zero, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A weakness has been identified in frdel/agent0ai agent-zero 0.9.7. This affects the function handle_pdf_document of the file python/helpers/document_query.py. This manipulation causes server-side request forgery. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-4308?


## How do I fix CVE-2026-4308?

No fix has been published for CVE-2026-4308 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4308 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4308 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4308 and fix it if it is affected.

What it is: CVE-2026-4308 is a medium-severity server-side request forgery vulnerability in agent0ai agent-zero, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4308 exists.

Affected product: agent0ai agent-zero. 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-2026-4308/ (Markdown: https://insights.sbomify.com/CVE-2026-4308/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4308
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4308
- OSV: https://osv.dev/vulnerability/CVE-2026-4308

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-4308/
Summaries are generated and may contain mistakes; the official description above is the record.