# Crawl4AI: Arbitrary file write (symlink/TOCTOU) plus log and webhook-header injection in Docker server

Advisory record · `GHSA-7cx2-g3h9-382p`

- **Identifiers:** `GHSA-7cx2-g3h9-382p` · `CVE-2026-56258` · `PYSEC-2026-228`
- **State:** Confirmed
- **Severity:** CVSS 9.2 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-22](https://cwe.mitre.org/data/definitions/22.html) · [CWE-59](https://cwe.mitre.org/data/definitions/59.html) · [CWE-93](https://cwe.mitre.org/data/definitions/93.html) · [CWE-117](https://cwe.mitre.org/data/definitions/117.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md) · [Other injection](https://agentprime.io/advisories/tag/injection.md)
- **Published:** 16 Jun 2026
- **Updated:** 21 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 16 Jun 2026, 21:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.2: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `crawl4ai` (PyPI): affected `<0.8.8`; fixed in `0.8.8`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> crawl4ai versions before 0.8.8 allow writing files outside the allowed output directory via symlinks in the Docker API's /screenshot and /pdf output_path. The API is unauthenticated by default, so an attacker with network access could write arbitrary files. Upgrade to 0.8.8, or set CRAWL4AI_API_TOKEN to require authentication.

Written 5 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.2 Critical, CVSS 4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0091, the 60th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:42 UTC: First seen by agentprime
- 31 Oct 2026, 14:42 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7cx2-g3h9-382p)

## Sources

- [GitHub Advisory Database: GHSA-7cx2-g3h9-382p](https://github.com/advisories/GHSA-7cx2-g3h9-382p)
- [OSV: GHSA-7cx2-g3h9-382p](https://osv.dev/vulnerability/GHSA-7cx2-g3h9-382p)
- <https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7cx2-g3h9-382p>
- <https://github.com/unclecode/crawl4ai/issues/1>
- <https://github.com/unclecode/crawl4ai/issues/2>
- <https://github.com/unclecode/crawl4ai/pull/3>
- <https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-228.yaml>
- <https://github.com/unclecode/crawl4ai>
- <https://www.vulncheck.com/advisories/crawl4ai-arbitrary-file-write-via-output-path-symlink-and-toctou>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-7cx2-g3h9-382p>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-7cx2-g3h9-382p/>. Everything for agents: <https://agentprime.io/llms.txt>.