CVE-2026-118694

waiting for further signals

EUVD-2026-112495 ↗

no check availablenot proven exploitable

cve.orgpublic pockev

trentm python-markdown2 <= 2.5.5

CWE-407 Inefficient Algorithmic Complexity

ETK-2026-2907, permanent identifier

cvss8.7cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6h 06msince last run

14mAI analysis

timeline

0 = cve.org publication

trigger signal (cve.org) +0hwaiting for further signals+0h32m

+2h

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description

python-markdown2 through version 2.5.5 can consume excessive CPU while parsing specially malformed Markdown inline links. An attacker who can submit Markdown for processing may cause service degradation or denial of service.

mitigation

Do not process untrusted Markdown with affected versions, or enforce strict input-size and processing-time limits around Markdown rendering. Monitor for an upstream fixed release before upgrading.

check

exploit

automation

contextual

auth required

EPSS

–

agent run time

14m

cve.org record, t = 0

2026-10-28 21:11Z

Δ to public poc

–

Δ to kev

–

outcome

Contextual, not validated: no deterministic check could cover this one, and no technique passed our review.

source signals

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

2026-10-28 21:11Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-118694

this entry in the feed

GET /api/v1/feed/CVE-2026-118694

{
  "etk_id": "ETK-2026-2907",
  "cve_id": "CVE-2026-118694",
  "display_id": "CVE-2026-118694",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-112495",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Algorithmic denial of service in python-markdown2",
  "summary": "python-markdown2 through version 2.5.5 can consume excessive CPU while parsing specially malformed Markdown inline links. An attacker who can submit Markdown for processing may cause service degradation or denial of service.",
  "mitigation": "Do not process untrusted Markdown with affected versions, or enforce strict input-size and processing-time limits around Markdown rendering. Monitor for an upstream fixed release before upgrading.",
  "vendor": "trentm",
  "product": "python-markdown2",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 2.5.5"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "python-markdown2",
      "purl": null
    }
  ],
  "cwes": [
    407
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 14.449344116666667,
  "t0_at": "2026-10-28T21:11:20.814000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-28T21:11:20.814000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-28T21:11:20.814000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-118694"
    }
  }
}

published 2026-10-28 21:29Z
last change 2026-10-28 23:42Z

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