# CVE-2026-91940

## Summary

- **CVE ID:** CVE-2026-91940
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-22
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

crawl4ai before 0.9.3 contains an arbitrary file write vulnerability in PDFContentScrapingStrategy where the _filter_untrusted_fields function fails to validate untrusted configuration fields. Attackers can submit crafted config bodies with malicious image_save_dir paths to write attacker-controlled bytes into any directory accessible to the service account.

## Affected Products

- unclecode — crawl4ai (0.9.0)
- unclecode — crawl4ai (0.9.3)

## References

- [CNA](https://github.com/unclecode/crawl4ai/security/advisories/GHSA-xpp7-j28w-2gvx)
- [CNA](https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-arbitrary-file-write-via-pdfcontentscrapingstrategy)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._