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CVE-2026-88753

7.5 high SSVC exploitation: poc Deferred
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 4

  1. CwesCWE-400NVD modified 2026-10-20 03:17
  2. CVSS7.5 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)NVD modified 2026-10-20 03:17
  3. StatusReceived → DeferredNVD modified 2026-10-16 19:56
  4. First seenunscoredNVD modified 2026-10-15 16:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 2