CVE-2026-97698

waiting for further signals

GHSA-phmp-hrw4-r36r ↗

no check availablenot proven exploitable

awaiting cvepublic poc−1.8dkev

pip:mistune < 3.3.4

fixed in 3.3.4

CWE-400 Uncontrolled Resource Consumption

ETK-2026-2055, permanent identifier

pkg:pypi/mistune

cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

1d 21h 12msince last run

29mAI analysis

timeline

0 = trigger signal

waiting for further signals−3h06mtrigger signal +0hpublic poc+0h

+12h

+24h

+36h

description

Mistune versions before 3.3.4 can use disproportionate CPU while parsing malformed Markdown link syntax. An unauthenticated attacker may stall a worker by submitting crafted Markdown where untrusted input is rendered.

mitigation

Upgrade Mistune to version 3.3.4 or later. Until upgraded, restrict or limit untrusted Markdown rendering to reduce exposure.

fixed in 3.3.4

check

exploit

automation

–

auth required

EPSS

–

agent run time

29m

cve.org record, t = 0

not published yet

Δ to public poc

−1.8d

Δ to kev

–

outcome

No artifact: an exploit or check was attempted but could not be produced at this moment.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-10-19 11:05Z
ghsa: trigger signal, started the run
https://github.com/lepture/mistune/security/advisories/GHSA-phmp-hrw4-r36r
2026-10-19 11:05Z
public poc
https://github.com/lepture/mistune/security/advisories/GHSA-phmp-hrw4-r36r

this entry in the feed

GET /api/v1/feed/CVE-2026-97698

{
  "etk_id": "ETK-2026-2055",
  "cve_id": "CVE-2026-97698",
  "display_id": "CVE-2026-97698",
  "ghsa_id": "GHSA-phmp-hrw4-r36r",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Quadratic CPU denial of service in Mistune link parsing",
  "summary": "Mistune versions before 3.3.4 can use disproportionate CPU while parsing malformed Markdown link syntax. An unauthenticated attacker may stall a worker by submitting crafted Markdown where untrusted input is rendered.",
  "mitigation": "Upgrade Mistune to version 3.3.4 or later. Until upgraded, restrict or limit untrusted Markdown rendering to reduce exposure.",
  "vendor": "pip",
  "product": "pip:mistune",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 3.3.4"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "3.3.4"
      ],
      "package_name": "mistune",
      "purl": "pkg:pypi/mistune"
    }
  ],
  "cwes": [
    400
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 29.403018133333333,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-19T11:05:07+00:00",
      "days": -1.7536499744560186,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T05:10:22.381572+00:00",
      "url": "https://github.com/lepture/mistune/security/advisories/GHSA-phmp-hrw4-r36r"
    },
    "trigger_signal": {
      "at": "2026-10-19T11:05:07+00:00",
      "days": -1.7536499744560186,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T05:10:22.381572+00:00",
      "url": "https://github.com/lepture/mistune/security/advisories/GHSA-phmp-hrw4-r36r"
    }
  }
}

published 2026-10-19 12:09Z
last change 2026-10-21 05:00Z

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