GHSA-7vh7-fw88-wj87: 
Ruby vulnerability analysis and mitigation

Several quadratic complexity bugs were identified in Commonmarker's underlying cmark-gfm library that could lead to unbounded resource exhaustion and subsequent denial of service. The vulnerability was assigned identifier GHSA-7vh7-fw88-wj87 and CVE-2023-37463. The issue affects Commonmarker versions below 0.23.10, with the patched version 0.23.10 released on July 31, 2023 (GitHub Advisory).

The vulnerability stems from quadratic complexity issues in the cmark-gfm library, which is the core component of Commonmarker. The issue was specifically related to polynomial time complexity security vulnerabilities that could cause resource exhaustion. The vulnerability has been assigned a Moderate severity rating and is categorized under CWE-407 (GitHub Advisory).

The vulnerability could lead to denial of service through unbounded resource exhaustion when processing specially crafted input. This could affect applications using the Commonmarker library for processing CommonMark formatted text (GitHub Advisory).

Users are advised to upgrade to Commonmarker version 0.23.10 or later to address this vulnerability. The fix was implemented through updates to the underlying cmark-gfm library, which resolved the polynomial time complexity issues (GitHub Advisory, RubyGems).