CVE-2026-115508
Published:October 22, 2026
Updated:October 23, 2026
Crawl4AI 0.7.0 before 0.9.5 contains an inefficient regular expression complexity vulnerability in the Docker API server that allows authenticated API clients to supply unbounded regular expressions in /crawl request bodies. Attackers can submit catastrophic-backtracking patterns via RegexExtractionStrategy.custom, RegexChunking.patterns or JsonCss, JsonXPath and JsonLxml schema regex fields against a crafted page to freeze the entire server, including /health.
Affected Packages
https://github.com/unclecode/crawl4ai.git (GITHUB):
Affected version(s) >=v0.5.0.post1 <v0.9.5Fix Suggestion:
Update to version v0.9.5https://github.com/unclecode/crawl4ai.git (GITHUB):
Affected version(s) >=docker-rebuild-v0.7.5 <docker-rebuild-v0.9.5Fix Suggestion:
Update to version docker-rebuild-v0.9.5crawl4ai (PYTHON):
Affected version(s) >=0.5.0 <0.9.5Fix Suggestion:
Update to version 0.9.5Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Regular Expression Complexity