CVE-2026-118694
highpython-markdown2 through 2.5.5 contains a denial of service vulnerability that allows remote users to exhaust CPU by submitting Markdown with unclosed inline l…
python-markdown2 through 2.5.5 contains a denial of service vulnerability that allows remote users to exhaust CPU by submitting Markdown with unclosed inline link destinations. Attackers can submit repeated '[a](' or '
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-10-28 22:17
Modified: 2026-10-28 22:17
NVD status: Received
Last synced 11 hours ago
Verified against the source API 2026-10-28 22:34 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/trentm/python-markdown2 disclosure@vulncheck.com
- https://github.com/trentm/python-markdown2/blob/2.5.5/lib/markdown2.py#L1478-L1492 disclosure@vulncheck.com
- https://github.com/trentm/python-markdown2/blob/2.5.5/lib/markdown2.py#L3029 disclosure@vulncheck.com
- https://github.com/trentm/python-markdown2/issues/750 disclosure@vulncheck.com
- https://github.com/trentm/python-markdown2/pull/751 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/python-markdown2-through-2.5.5-denial-of-service-via-... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 22:34 UTC · record ↗