CVE-2026-40890

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

April 14, 2026

Last Modified

April 27, 2026

CWE ID

CWE-125

Source

GitHub

Vendor

Product

github.com/gomarkdown/markdown

External References

https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7
https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778
https://github.com/advisories/GHSA-77fj-vx54-gvh7

CVE-2026-40890

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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