Threats tagged 'ghsa-gjv8-xp57-g29c'

CVE-2026-86000 is a medium severity vulnerability in the Python library soupsieve (used by BeautifulSoup) involving uncontrolled resource consumption due to a regular expression backtracking issue. The flaw arises from overlapping quantified character classes in the regex pattern used to parse CSS selectors, causing quadratic time complexity when processing certain crafted selectors that fail to match. This can lead to significant CPU consumption and delays when user-controlled selectors are processed. The vulnerability affects soupsieve versions prior to 2.9. Exploitation requires passing a maliciously crafted CSS selector string to soupsieve or BeautifulSoup's select methods. No known exploits are reported in the wild, and no official patch information is provided in the input data.