MEDIUM 5.3 NVD
CVE-2026-104477
Showdown through 2.1.0 contains a cross-site scripting vulnerability in the makehtml link and image subparsers, which fail to escape double quotes in destinatio
Showdown through 2.1.0 contains a cross-site scripting vulnerability in the makehtml link and image subparsers, which fail to escape double quotes in destination URLs placed into href and src attributes. Attackers can craft markdown links or images containing a double quote followed by onerror or onmouseover handlers to execute script when victims view rendered HTML.
References
- https://github.com/showdownjs/showdown
- https://github.com/showdownjs/showdown/commit/4fb992cd26631c108ec0410342630c80207ec7c6
- https://www.vulncheck.com/advisories/showdown-through-2.1.0-xss-via-unescaped-quote-in-hre
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-10-03 via NVD.
vulnfeed aggregates 9972 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.