CVEvulnerability
CVE-2026-118694
8.7 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-10-28
- Last modified
- 2026-10-29
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.7 HIGH — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-407
Description
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 '
- CWE-407 Inefficient Algorithmic Complexity weakness
References
- https://github.com/trentm/python-markdown2 github.com
- https://github.com/trentm/python-markdown2/blob/2.5.5/lib/markdown2.py#L1478-L1492 github.com
- https://github.com/trentm/python-markdown2/blob/2.5.5/lib/markdown2.py#L3029 github.com
- https://github.com/trentm/python-markdown2/issues/750 github.com
- https://github.com/trentm/python-markdown2/pull/751 github.com
- https://www.vulncheck.com/advisories/python-markdown2-through-2.5.5-denial-of-service-via-unclosed-inline-link-destinations www.vulncheck.com