Vulnerability · MAL-2026-17396
Malicious code in kiyoramarkets (npm)
Published Oct 8, 2026 · catalog updated Oct 8, 2026 · Malicious code in kiyoramarkets
Open the advisory
Exploitation likelihood is not on this record for MAL-2026-17396. A missing EPSS score is not a low risk. Compare Malicious code in kiyoramarkets with the linked advisory before you change production.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Malicious code in kiyoramarkets).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- EPSS is missing. A missing score is not a low risk.
- Severity
- Unknown—
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- Awaiting synchronization with FIRST
- Remediation
- Advisory link
- Affected products
- npm kiyoramarkets
This package is part of a large family (100+ identified as of September 2026) of near-identical forks of the Baileys WhatsApp Web library that inject a covert channel-subscription action into the WhatsApp socket layer. On connect, the injected code issues an authenticated FOLLOW query (query_id 7871414976211147) against one or more attacker-chosen WhatsApp Channel/Newsletter JIDs, using the installer's own authenticated WhatsApp session -- silently subscribing the victim's account to channels it never asked to join. The target JID(s) are hidden from casual source review via one of several obfuscation techniques observed across the family: a plain string literal, base64 encoding, base64+XOR, or a char-code array reconstructed at runtime. Some variants instead fetch a mutable, attacker-controlled remote JSON/JS list of target JIDs from GitHub or another host at runtime, letting the target list change after installation without a new npm publish. Every sample in the family shares the same underlying mechanism (a wrapped/patched socket-connect routine that fires the FOLLOW query some seconds after connect), even though the package name, JID value(s), and obfuscation/delivery method differ per fork. The malicious action abuses the installer's own authenticated WhatsApp session to gain reach and subscribers for attacker-controlled channels; it does not exfiltrate credentials, establish persistence, or execute arbitrary remote code. Affected package: kiyoramarkets (npm), version(s): 8.0.16. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (6ace45bb33f00d6362e55c9a7521d0efb1cb24761231b8befcce4520aedea430) kiyoramarkets is a fork of the Baileys WhatsApp library that adds undocumented behavior using the installer's authenticated WhatsApp session for the author's benefit. On every socket connection, socketConnect() fetches a JSON list from a hardcoded GitHub raw URL constructed by decoding a char-code array (resolves to https://raw.github
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- npm kiyoramarkets8.0.16
How to fix MAL-2026-17396
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
Exploitation likelihood is not on this record for MAL-2026-17396. A missing EPSS score is not a low risk. Compare Malicious code in kiyoramarkets with the linked advisory before you change production.
Which versions are affected?
Compare what you have installed with 8.0.16. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Oct 8, 2026 · OpenSSF OSV / OSV Scanner
Detected
This package is part of a large family (100+ identified as of September 2026) of near-identical forks of the Baileys WhatsApp Web library that inject a covert channel-subscription action into the WhatsApp socket layer. On connect, the injected code issues an authenticated FOLLOW query (query_id 7871414976211147) against one or more attacker-chosen WhatsApp Channel/Newsletter JIDs, using the instal
Oct 8, 2026 · OpenSSF OSV / OSV Scanner
Updated
This package is part of a large family (100+ identified as of September 2026) of near-identical forks of the Baileys WhatsApp Web library that inject a covert channel-subscription action into the WhatsApp socket layer. On connect, the injected code issues an authenticated FOLLOW query (query_id 7871414976211147) against one or more attacker-chosen WhatsApp Channel/Newsletter JIDs, using the instal
Sources
- OpenSSF OSV / OSV ScannerPackage advisoryMAL-2026-17396
Malicious code in kiyoramarkets (npm)
osv.dev
References
Freshness
Last verified in this catalog Oct 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.