VulnSocial

CVE-2026-59928Disclosure(mistune_project / mistune)

LOWCVSS 7.5 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

mistune_project CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-407CWE-1333

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • mistune

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Affected systems

Vendors
mistune_project
Products
mistune

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-07-08: 2Technical Details · 2026-07-08: 107-08
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-59928 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 ca… https://www.cve.org/CVERecord?id=CVE-2026-59928 ----- Traducción: CVE-2026-59928 Mis… http://infoflow.cloud`

    Post summary

    The tweet reports CVE-2026-59928, highlighting a flaw in Mistune before v3.3.0 involving repeated reference-link definitions, but offers no PoC, exploit, or patch information.

    0000034
    91 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-59928 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 ca… https://www.cve.org/CVERecord?id=CVE-2026-59928

    Post summary

    The post only references CVE‑2026‑59928 and links to its CVE record, without providing additional technical or exploit information.

    00000700
    57.8K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmistune_projectmistune---

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