Is github.com/gomarkdown/markdown affected by CVE-2026-40890?

Go github.com/gomarkdown/markdown is affected in <0.0.0-20260411013819-759bbc3e3207.

Is CVE-2026-40890 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

high

CVE-2026-40890

Q: Is CVE-2026-40890 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

Go · github.com/gomarkdown/markdown

Summary

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

Severity: high
EPSS: 0.3% (p26)
Also known as: GHSA-77fj-vx54-gvh7
Published: 2026-04-14

References

https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7
https://nvd.nist.gov/vuln/detail/CVE-2026-40890
https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.