CVE-2026-40890
Go Markdown has an Out-of-bounds Read in SmartypantsRenderer
7.5
HIGH
CVSS 3.1
EPSS 0.07%
Description
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.
How to fix CVE-2026-40890
To remediate CVE-2026-40890, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 0.0.0-20260411013819-759bbc3e3207 or later
Is CVE-2026-40890 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- from 0, < 0.0.0-20260411013819-759bbc3e3207
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |