What’s Vulnerable › Vulnerabilities

CVE-2026-88753

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-20
• Weakness: CWE-400

Description

A Regular-Expression Denial of Service (ReDoS) in the Markdown2. extract_metadata() function (lib/markdown2.py) of trentm markdown2 through v2.5.5 allows attackers to cause a Denial of Service (DoS) via a crafted Markdown document.

References

• https://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba
• https://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba

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