{"cve":"CVE-2026-40890","nvd":{"published":"2026-04-21T20:17:02.810","modified":"2026-10-26T21:10:00.170","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-125"],"references":["https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520eda2778","https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7","https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7"],"products":["gomarkdown:markdown"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-40890","score":0.00346,"percentile":0.27884,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-77fj-vx54-gvh7","url":"https://osv.dev/vulnerability/GHSA-77fj-vx54-gvh7","summary":"Go Markdown has an Out-of-bounds Read in SmartypantsRenderer","modified":"2026-09-10T03:50:43.591647238Z","packages":[{"ecosystem":"Go","name":"github.com/gomarkdown/markdown","purl":"pkg:golang/github.com/gomarkdown/markdown","ranges":["<0.0.0-20260411013819-759bbc3e3207"],"fixed":["0.0.0-20260411013819-759bbc3e3207"]}]},{"id":"GO-2026-5208","url":"https://osv.dev/vulnerability/GO-2026-5208","summary":"Go Markdown has an out-of-bounds read in SmartypantsRenderer in github.com/gomarkdown/markdown","modified":"2026-07-24T19:00:21.574574883Z","packages":[{"ecosystem":"Go","name":"github.com/gomarkdown/markdown","purl":"pkg:golang/github.com/gomarkdown/markdown","ranges":["<0.0.0-20260411013819-759bbc3e3207"],"fixed":["0.0.0-20260411013819-759bbc3e3207"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}