High severity · published Sep 15, 2026
CVE-2026-91940
crawl4ai before 0.9.3 Arbitrary File Write via PDFContentScrapingStrategy
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
crawl4ai · unclecode
0.9.0 before 0.9.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91940
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91940
github.com
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-xpp7-j28w-2gvx
www.vulncheck.com
https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-arbitrary-file-write-via-pdfcontentscrapingstrategy
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