claims-get-error-string (npm) · Malicious Code
Affects claims-get-error-stringSource GCVE Database
Malicious package : remove claims-get-error-string and rotate any secrets on hosts that installed it.
Data as of 5 Aug 2026, 16:12 UTC
Malicious package
Published to npm · OSV MAL-2026-12620
What to do
Remove claims-get-error-string 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-get-error-string | Affected
| Fixed in– |
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Description
The npm package 'claims-get-error-string' version 35.5.9 contains malicious code that downloads and executes a platform-specific binary from hardcoded Cloudflare Workers hosts. The binary is saved to temporary directories with innocuous names, given executable permissions, and executed detached from the main process. Additionally, a DNS-TXT covert channel is used as a fallback method to reassemble and deliver the payload from sequential TXT records under the domain wel1.ru. A secondary telemetry module with similar dropper logic is included but not invoked in this version. There is no hash pinning or signature verification for the downloaded payload, increasing the risk of malicious activity.