CVE-2026-40890

EUVD-2026-24280
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 27.4%
Affected Products (NVD)
VendorProductVersion
gomarkdownmarkdown
𝑥
< 2026-04-10
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
golang-github-gomarkdown-markdown
bookworm
no-dsa
forky
0.0~git20260725.8435af3-1
fixed
sid
0.0~git20260725.8435af3-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
golang-github-gomarkdown-markdown
jammy
dne
noble
needs-triage
questing
ignored
resolute
needs-triage
Common Weakness Enumeration
References
https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778
https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7
https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7