CVE-2026-40890
HIGHgithub.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer
Title source: cnaDescription
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.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7
X_Refsource_Misc x_refsource_misc
https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778
Scores
CVSS v3
7.5
EPSS
0.0035
EPSS Percentile
26.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-125
Status
published
Products (3)
gomarkdown/markdown
< 2026-04-10
gomarkdown/markdown
0 - 0.0.0-20260411013819-759bbc3e3207Go
gomarkdown/markdown
< 759bbc3e32073c3bc4e25969c132fc520eda2778
Published
Apr 21, 2026
Tracked Since
Apr 22, 2026