MalwarePublished 5 Aug 2026

dolyame-ui-calendar (npm) · Malicious Code

Affects dolyame-ui-calendarSource GCVE Database

Malicious package : remove dolyame-ui-calendar and rotate any secrets on hosts that installed it.

Data as of 5 Aug 2026, 20:01 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-13140

What to do

Remove dolyame-ui-calendar 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
npmdolyame-ui-calendar	Affected =35.1.8	Fixed in–

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Description

The npm package dolyame-ui-calendar version 35.1.8 contains malicious code that, upon requiring its main module, downloads and executes opaque binaries from obfuscated Cloudflare Workers hosts or via DNS TXT record covert channels. This behavior includes writing executables to hidden temporary files, setting executable permissions, and spawning these binaries detached from the main process. The package disguises this malicious activity behind telemetry and analytics-like code to evade detection. No CVSS score is available for this threat.

Impact

This malicious package can execute arbitrary binaries on the host system without user consent, potentially leading to full system compromise, data theft, or further malware deployment. The covert DNS TXT record channel allows bypassing network egress controls that block unknown HTTP hosts, increasing the difficulty of detection and containment. The obfuscation and disguise as telemetry code further hinder detection by security tools.

Defensive guidance

Users should immediately remove version 35.1.8 of dolyame-ui-calendar from their projects and avoid using this package. Audit dependencies for this package and replace it with a trusted alternative. Monitor for any signs of compromise if this package was previously installed. Check vendor advisories or npm security advisories for updates or official guidance.

Summary

The dolyame-ui-calendar npm package version 35.1.8 advertises itself as a zero-dependency React calendar component but contains malicious code that fetches and executes opaque binaries from obfuscated Cloudflare Workers hosts or via DNS TXT record responses from suspicious domains. The malicious payload is written to hidden temporary files with executable permissions and spawned detached from the main process using platform-specific commands. Additional evasion techniques include dynamic property name concatenation and a telemetry-like facade to disguise the drop-and-execute behavior. The fetched binaries are unverified and unrelated to the package's advertised functionality.

References

npmjs.com/package/dolyame-ui-calendar/v/35.1.8 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 20:01 UTC

Technical details

References

Community reviews