🛡️ MAL-2026-12649 — clients-structure

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in clients-structure (npm)

Source: amazon-inspector

On require() of clients-structure, index.js loads _ext.js which selects a platform-specific endpoint, fetches a binary from a rotating list of anonymous Cloudflare Workers subdomains (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT fallback channel over sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru that reconstructs a base64 payload chunked across numbered TXT records. The fetched bytes are written to a temp path, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe. Destination hostnames are assembled at runtime from split string fragments joined via Array.join, and a /tmp/.analytics_state TTL marker plus an opt-out env-var facade serve as cover story. No hash or signature verification is performed, and the destinations bear no relation to any declared publisher.

Affected software

MAL-2026-12649 is recorded against 1 package.

  • clients-structure

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
clients-structure — —

Free Vulnerability Check

Is your site affected by MAL-2026-12649?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against MAL-2026-12649 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.