GO-2026-5208 Go Markdown has an out-of-bounds read in SmartypantsRenderer in github.com/gomarkdown/markdown

Go Markdown has an out-of-bounds read in SmartypantsRenderer in github.com/gomarkdown/markdown...

Out-of-bounds Read

github.com/gomarkdown/markdown is vulnerable to an Out-of-Bounds Read. The vulnerability is due to improper handling of malformed Markdown input containing a character when processed by the SmartypantsRenderer, which allows an attacker to trigger an out-of-bounds read or cause the application to...

CVE-2026-40890

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 anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

CVE-2026-40890 github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

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 anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

CVE-2026-40890 github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

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 anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

CVE-2026-40890

CVE-2026-40890 affects github.com/gomarkdown/markdown. A malformed input containing a '' read by the SmartypantsRenderer can trigger an out-of-bounds read or a panic. The vulnerability is fixed in commit 759bbc3e32073c3bc4e25969c132fc520eda2778. Connected advisories confirm the same description a...

CVE-2026-40890

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 anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

CVE-2026-40890 github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

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 anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

CVE-2026-40890

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 anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

Go Markdown has an Out-of-bounds Read in SmartypantsRenderer

Summary Processing a malformed input containing a character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. Details The smartLeftAngle function in html/smartypants.go:367-376 performs an out-of-bounds slice operation when processing a characte...

PT-2026-33236

Name of the Vulnerable Software and Affected Versions github.com/gomarkdown/markdown affected versions not specified Description Processing malformed input containing a character anywhere in the remaining text using a SmartypantsRenderer can lead to an Out of Bounds read or a panic. This occurs...