showdownxss (npm) · Malicious Code
Affects showdownxssSource GCVE Database
Malicious package : remove showdownxss and rotate any secrets on hosts that installed it.
Data as of 12 Nov 2026, 18:34 UTC
Malicious package
Published to npm · OSV MAL-2026-23
What to do
Remove showdownxss from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmshowdownxss | Affected– | Fixed in– |
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Description
The npm package 'showdownxss' was identified as containing malicious code. Any system with this package installed or running is considered fully compromised, with potential unauthorized access to secrets and keys. Immediate removal of the package is advised, along with rotation of all secrets and keys from a separate, secure system. However, removal of the package may not fully eliminate the malicious presence due to possible deeper system compromise.