CVE-2026-40890
High · 7.5CVSS
7.5
EPSS
0.5%
Published
Apr 21, 2026
CISA due date
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The record
The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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Related vulnerabilities
- GHSA-77fj-vx54-gvh7 Go Markdown has an Out-of-bounds Read in SmartypantsRenderer Same vulnerability
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