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 '![a](' sequences, causing _find_balanced to rescan the remaining document for each link and consume quadratic CPU time.
Project Subscriptions
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 28 Oct 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 '![a](' sequences, causing _find_balanced to rescan the remaining document for each link and consume quadratic CPU time. | |
| Title | python-markdown2 through 2.5.5 Denial of Service via Unclosed Inline Link Destinations | |
| First Time appeared |
Python-markdown2 Project
Python-markdown2 Project python-markdown2 |
|
| Weaknesses | CWE-407 | |
| CPEs | cpe:2.3:a:python-markdown2_project:python-markdown2:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Python-markdown2 Project
Python-markdown2 Project python-markdown2 |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-28T21:11:20.814Z
Reserved: 2026-10-28T17:31:29.498Z
Link: CVE-2026-118694
No data.
Status : Received
Published: 2026-10-28T22:17:13.700
Modified: 2026-10-28T22:17:13.700
Link: CVE-2026-118694
No data.
OpenCVE Enrichment
Updated: 2026-10-29T05:45:14Z
Weaknesses