Not yet scoredPublished Oct 15, 2026

CVE-2026-88753A Regular-Expression Denial of Service (ReDoS) in the Markdown2.

Updated under an hour ago (2026-10-19 08:30 UTC)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Deferred
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

No affected products are listed yet.

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.