Snyk Security Database

Affected versions of this package are vulnerable to Embedded Malicious Code. This package was involved in a supply chain compromise that affected multiple namespaces on the npm registry, including popular caching and key-value storage utilities. A malicious actor compromised a maintainer’s account or CI pipeline, allowing them to publish tampered versions across dozens of packages. The payload subsequently acted as a self-propagating worm by harvesting developer tokens from compromised environments and republishing new infected packages across other organizations.

Affected versions of this package are vulnerable to HTTP Request Smuggling in the WebSocket upgrade. An attacker can bypass request boundaries and interfere with HTTP request processing by crafting specially constructed HTTP requests.

Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the readOpaque() method of MLSInputStream, which decodes a varint length up to 0x3FFFFFFF (about 1 GiB) and calls readAll(size) performing new byte[size] before checking that enough bytes remain in the stream. An attacker can exhaust the JVM heap and crash the process by sending a ~6-byte MLS message whose first opaque length varint is 0xBFFFFFFF, forcing a ~1 GiB allocation per message. This requires only the ability to send raw MLS bytes to the application, since the allocation occurs before any signature or MAC verification.