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VULNERABILITIES

CVE-2026-40890 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7 CISA-ADPExploitVendor Advisory
https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778 [email protected]Patch
https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7 [email protected]ExploitVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-125Out-of-bounds Read[email protected]

Affected Products

ProductVersions
gomarkdown markdown
< 2026-04-10

CPE

  • cpe:2.3:a:gomarkdown:markdown:*:*:*:*:*:go:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-40890
NVD Published Date:
Apr 21, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-40890 Details - Not Deferred