Medium severity6.1NVD Advisory· Published Oct 3, 2026

CVE-2026-104477

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Showdownjs/Showdownllm-fuzzy
Range: <=2.1.0

Patches

Vulnerability mechanics

References

github.com/showdownjs/showdown/commit/4fb992cd26631c108ec0410342630c80207ec7c6nvd
www.vulncheck.com/advisories/showdown-through-2.1.0-xss-via-unescaped-quote-in-href-and-src-attributesnvd

News mentions

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cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000