CVE-2026-40890

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/21/2026

Last Modified4/21/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-125

References

https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778(security-advisories@github.com)

https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7(security-advisories@github.com)

https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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