CVE-2026-88753CWE-400denial-of-service

CVE-2026-88753

High · published October 15, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
24.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00324 · 24.2th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-10-15T20:18Z
References (2)
https://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba · [email protected]https://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 OCT 03:34Z
    EPSS moved — → 0%
    epss
  • 15 OCT 00:00Z
    A Regular-Expression Denial of Service (ReDoS) in the Markdown2
    cvelistv5
  • 15 OCT 00:00Z
    A Regular-Expression Denial of Service (ReDoS) in the Markdown2
    cvelistv5