CVE•Published 2026-09-07•Modified 2026-09-08•0 articles on news•5 live references•NVD data
CVE-2026-86433
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
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Weaknesses (CWE)
Description
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Attributes extension where AttributesListener::findTargetAndDirection() performs quadratic-time sibling list scanning. Unauthenticated attackers can submit approximately 32 KB of repeated attribute blocks to cause parsing to take over 5 seconds, exhausting server resources.
Timeline
Published 2026-09-07
Modified 2026-09-08
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-86433Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-86433Censys host search filtered to this CVE id.
grep.app
CVE-2026-86433Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-86433GitHub code search for direct mentions.
Google dork
"CVE-2026-86433" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-86433 on GitHub.
We haven't classified any articles referencing CVE-2026-86433 yet. The external references above still apply.