Dashboard / CVE-2026-59928

CVE-2026-59928

HIGH
MEDIUM Priority: 0.05 BB Relevance: 75/100
Published: 2026-07-08 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/block_parser.py and the ref_links environment dictionary handling, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
mistune_project mistune < 3.3.0

References & Advisories (3)

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.65%
Raw Score 0.006510
Percentile 51.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00651
2026-10-28
0.00651

Intelligence Sources

nvd ref →

External Links