registry / Remote code execution / devplatform-vite-plugin-preserve-css-modules
devplatform-vite-plugin-preserve-css-modules
Devplatform vite plugin preserve css modules runtime support module
This report shows the evidence for devplatform-vite-plugin-preserve-css-modules@35.6.8, the only known version.
This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiConcrete import-time staging and execution of an unverified remote binary is malicious behavior, not package-aligned Vite plugin functionality. The unused telemetry module contains the same loader pattern, reinforcing intent.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of the main index.js entrypoint.
Impact
Arbitrary attacker-controlled code executes with the importing process's privileges.
Mechanism
remote payload download/DNS staging followed by detached native execution
Attack narrative
The main entrypoint suppresses errors while requiring _loader.js. That module contacts obfuscated remote hosts for a platform-specific binary, falls back to Base64 data assembled from DNS TXT records, saves the result in a temp directory, marks it executable on Unix, and launches it through a detached shell or cmd.exe process. This is silent import-time remote code execution.
AI rationale
Concrete import-time staging and execution of an unverified remote binary is malicious behavior, not package-aligned Vite plugin functionality. The unused telemetry module contains the same loader pattern, reinforcing intent.
Evidence
package.jsonindex.js_loader.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/package
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports _loader.js on every package import.
- _loader.js downloads platform binaries from obfuscated workers.dev hosts.
- _loader.js reconstructs fallback .ru DNS domains and decodes TXT payloads.
- Downloaded bytes are written under /var/tmp or Windows Temp, chmodded, then detached-executed.
Evidence against
- package.json has no lifecycle scripts.
- The exported plugin class itself is minimal; malicious behavior is in the import side effect.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
5 flagged · loading source_loader.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const os = require("os");
...
L43: const CACHE_TTL = 21712;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_loader.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _loader.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const os = require("os");
...
L43: const CACHE_TTL = 21712;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: if (e || !rr || !rr.length) return r("");
Critical
Trigger Reachable Dangerous Capability
A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.
_loader.jsView on unpkg · L3Findings
2 Critical3 High3 Medium2 Low
CriticalDownload Execute_loader.js
CriticalTrigger Reachable Dangerous Capability_loader.js
HighChild Process_loader.js
HighKnown Malware Source Similaritylib/telemetry.js
HighKnown Malware Source Similarity_loader.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to devplatform-vite-plugin-preserve-css-modules@35.6.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-vite-plugin-preserve-css-modules@35.6.8. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.