CVE-2026-88753: n/a
Description
A Regular-Expression Denial of Service (ReDoS) vulnerability exists in the extract_metadata() function of the markdown2 library (trentm markdown2) through version 2.5.5. This flaw allows an attacker to cause a denial of service by submitting a specially crafted Markdown document that triggers excessive processing in the vulnerable function.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-88753 identifies a ReDoS vulnerability in the extract_metadata() function located in lib/markdown2.py of the trentm markdown2 library up to version 2.5.5. The vulnerability arises from the use of regular expressions that can be exploited by an attacker to cause excessive CPU consumption, resulting in a denial of service condition when processing malicious Markdown input.
Potential Impact
An attacker can cause a denial of service by submitting a crafted Markdown document that triggers the vulnerable regular expression processing in the extract_metadata() function. This leads to resource exhaustion and service unavailability for legitimate users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting or sanitizing Markdown input from untrusted sources to reduce exposure to this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-09-10T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6ad0f6002cdf04f65641fe1c
Added to database: 10/15/2026, 15:49:20 UTC
Last enriched: 10/15/2026, 16:03:40 UTC
Last updated: 10/15/2026, 16:08:14 UTC
Views: 6
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