MalwarePublished 5 Aug 2026

claims-jira-service (npm) · Malicious Code

Affects claims-jira-serviceSource GCVE Database

Malicious package : remove claims-jira-service and rotate any secrets on hosts that installed it.

Data as of 5 Aug 2026, 16:14 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12627

What to do

Remove claims-jira-service 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
npmclaims-jira-service	Affected =35.8.3	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

The npm package 'claims-jira-service' version 35.8.3 contains malicious code that, when required, downloads and executes a platform-specific executable from attacker-controlled hosts. The payload is fetched using obfuscated hostnames and a DNS TXT record fallback, written to temporary files with disguised names, given execute permissions, and run detached from the main process. Execution is throttled using a benignly named stamp file. The obfuscation techniques include string splitting to evade static analysis and covert data transport via DNS TXT chunking.

Impact

This malicious package can execute arbitrary code on the host system by downloading and running attacker-controlled executables. This can lead to unauthorized system access, persistence, data exfiltration, or further compromise depending on the payload. The obfuscation and covert communication channels increase the difficulty of detection and mitigation.

Defensive guidance

Users should immediately remove the 'claims-jira-service' package version 35.8.3 from their environments. Audit and verify all dependencies for integrity and provenance before installation. Monitor for any signs of compromise related to this package.

Summary

The 'claims-jira-service' npm package version 35.8.3 includes a malicious module that loads an auxiliary script (_ext.js) which downloads an executable payload from multiple attacker-controlled domains assembled dynamically at runtime. The payload is saved to temporary files with disguised names and executed with elevated permissions. The use of DNS TXT records as a fallback channel and string splitting to obfuscate hostnames and payload paths are designed to evade detection. A stamp file named '.analytics_state' is used to limit repeated execution. This behavior constitutes a supply chain compromise through a malicious npm package.

References

npmjs.com/package/claims-jira-service/v/35.8.3 (opens in a new tab)

Community reviews

Loading reviews…

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 16:14 UTC

Technical details

References

Community reviews