CVE-2026-91940 PUBLISHED

crawl4ai before 0.9.3 Arbitrary File Write via PDFContentScrapingStrategy

Assigner: VulnCheck
Reserved: 15.09.2026 Published: 15.09.2026 Updated: 15.09.2026

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.

CVSS Vector: 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	unclecode
Product	crawl4ai
Versions	Default: unaffected affected from 0.9.0 to 0.9.3 (excl.) Version 0.9.3 is unaffected

Credits

manus-use reporter

References

Problem Types

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE