GHSA-836R-79RF-4M37 Soup Sieve: Regular Expression Denial of Service (ReDoS) via Selector Parser

Summary The CSS selector parser in soupsieve the CSS selector engine for Beautiful Soup 4 contains a regular expression vulnerable to catastrophic backtracking. When processing an attribute selector with an unterminated quoted value, the VALUE regex pattern in cssparser.py enters exponential...

PT-2026-56840

Name of the Vulnerable Software and Affected Versions soupsieve affected versions not specified Description The CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking, which occurs when the regex engine takes an exponential amount of time to process...