Inefficient regular expression complexity in scrapy - #VU127073
Published: February 14, 2024 / Updated: April 23, 2026
Vulnerability identifier: #VU127073
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient regular expression complexity in open_in_browser when processing a response without a base tag. A remote attacker can provide a specially crafted response to cause a denial of service.
This issue affects Scrapy 2.6.0 through 2.11.0.
Affected software
scrapy
Remediation
Install security update from vendor's website.
scrapy - addressed in versions 1.8.4, 2.11.1