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vm2's bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

vm2 bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike The bufferAllocLimit option introduced in 3.11.0 (GHSA-6785-pvv7-mvg7) caps host-side Buffer allocations driven by sandbox code, the way embedders opt into timeout. The cap wraps Buffer.alloc, Buffer.allocUnsafe, Buffer.allocUnsafeSlow, and the deprecated Buffer(N) / new Buffer(N) forms. Two other API paths reach the same host C++ allocator with an attacker-controlled size and are not capped: Buffer.concat(list, totalLength) and Buffer.from(arrayLike) with a fake length. …

vm2: NodeVM `builtin: ['*']` exposes `os` and `dns` — process-wide observability reads AND writes that hijack the host (sibling class of GHSA-9g8x-92q2-p28f)

GHSA-9g8x-92q2-p28f closed the "process-wide observability builtins" class by adding diagnostics_channel, async_hooks, perf_hooks, and v8 to DANGEROUS_BUILTINS in lib/builtin.js. The fix's rationale (in the commit message and docs/ATTACKS.md Category 35) is general: Process-wide observability builtins. Unlike most Node builtins, these expose state of the entire host process rather than sandbox-local state — the vm2 boundary cannot usefully contain them because the data they surface […] belongs to the embedder. Even a …

VM2 has Missing Error.cause Sanitization that Enables Sandbox Escape to RCE

I found that handleException() in lib/setup-sandbox.js recursively sanitizes sub-errors for SuppressedError and AggregateError, but completely ignores the ES2022 Error.cause property. When sandbox code catches a host-thrown error carrying a .cause that references a host object like process, it can traverse that reference to achieve arbitrary command execution on the host. The project's own docs/ATTACKS.md (Defense Invariant #3, line 54) explicitly claims Error.cause is sanitized. The implementation does not match this …

uniget CLI: Metadata signature verification only runs when UNIGET_IGNORE_METADATA_SIGNATURE is set

The sigstore check on metadata.json is gated on the wrong side of the condition. LoadMetadata in internal/config/update.go:81 verifies the bundle only when UNIGET_IGNORE_METADATA_SIGNATURE is non-empty, so in a normal run, where nobody sets that variable, the signature is never checked. Setting the variable that is named "ignore the signature" is what turns verification on. That matters because metadata.json populates Tool.Check, and pkg/tool/tool.go:250 runs Tool.Check through /bin/bash -c. That is the …

uniget CLI has Path Traversal in Hook Files - Directory Escape Vulnerability

Path Traversal vulnerability in hook filename handling allows attackers to access and manipulate arbitrary files outside the hooks directory via directory escape sequences like passwd. Details File: hooks.go Lines 135-160 hookFileName := args[0] // User input not validated hookFile = preInstallHooksDir + "/" + hookFileName // Direct concatenation Hook filenames are concatenated directly without sanitizing ../ sequences, allowing directory traversal.

uniget CLI has an EDITOR Command Injection

The uniget CLI has a command injection vulnerability in hooks.go line 199 where strings.Split(editor, " ") naively parses the EDITOR environment variable without respecting shell syntax. An attacker can set EDITOR="/path/to/wrapper && id && echo" which gets split into separate arguments, allowing the wrapper script to execute arbitrary commands like id. This was successfully exploited to execute uid=1000(w4nn4d13), confirming code execution is possible. The vulnerability affects hook editing and breaks …

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Two LiteLLM versions published containing credential harvesting malware

After an API Token exposure from an exploited trivy dependency, two new releases of litellm were uploaded to PyPI containing automatically activated malware, harvesting sensitive credentials and files, and exfiltrating to a remote API. Anyone who has installed and run the project should assume any credentials available to litellm environment may have been exposed, and revoke/rotate thema ccordingly.