Bug 2563209 (CVE-2026-118694) - CVE-2026-118694 markdown2: markdown2: Denial of Service via unclosed inline link destinations
Summary: CVE-2026-118694 markdown2: markdown2: Denial of Service via unclosed inline l...
Keywords:
Status: NEW
Alias: CVE-2026-118694
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-28 21:27 UTC by OSIDB Bzimport
Modified: 2026-10-30 13:41 UTC (History)
15 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-28 21:27:51 UTC 
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.
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