registry / Remote code execution / checkout-postpone-until-render
checkout-postpone-until-render
Checkout postpone until render abstraction layer
This report shows the evidence for checkout-postpone-until-render@35.2.4, 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-aiThe advertised abstraction has no need for an import-time remote executable loader. The concrete network-to-disk-to-detached-process chain is malicious remote code execution.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of index.js.
Impact
Unconsented arbitrary native code execution under the importing process user.
Mechanism
import-time remote binary download and detached execution
Attack narrative
index.js silently requires _vendor.js during ordinary package import. Its immediately invoked async routine contacts obfuscated worker hosts for a platform-specific binary, with DNS TXT reconstruction as fallback; it writes the bytes to a temporary executable, marks it executable on Unix, and launches it through a detached shell or cmd.exe process.
AI rationale
The advertised abstraction has no need for an import-time remote executable loader. The concrete network-to-disk-to-detached-process chain is malicious remote code execution.
Evidence
package.jsonindex.js_vendor.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints8
oob-worker.cf103-070.workers.devoob-worker.cf101-adf.workers.devoob-worker.cf99-9b3.workers.devoob-worker.cf100-416.workers.devsdk.dl.wel1.ruext.dl.wel1.rupkg.dl.wel1.runet.dl.wel1.ru
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports _vendor.js on every package import.
- _vendor.js fetches platform-specific binaries from obfuscated hosts.
- _vendor.js falls back to DNS TXT payload delivery.
- Downloaded bytes are written, chmodded, and launched detached.
- Execution is automatic at import, not an explicit user command.
Evidence against
- package.json has no lifecycle scripts.
- No credential collection or exfiltration is evident in the entrypoint path.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_vendor.jsView file
4const crypto = require("crypto");
L5: const https = require("https");
L6: const os = require("os");
...
L45: const CACHE_TTL = 20248;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_vendor.jsView on unpkg · L44Trigger-reachable chain: manifest.main -> index.js -> _vendor.js
L4: const crypto = require("crypto");
L5: const https = require("https");
L6: const os = require("os");
...
L45: const CACHE_TTL = 20248;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: 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.
_vendor.jsView on unpkg · L4Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_vendor.js
CriticalTrigger Reachable Dangerous Capability_vendor.js
HighChild Process_vendor.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to checkout-postpone-until-render@35.2.4.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-postpone-until-render@35.2.4. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.