What is CVE-2018-11590?

CVE-2018-11590 is a medium-severity vulnerability in Espruino, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2018-05-31.

How severe is CVE-2018-11590?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Integer overflow in Espruino

CVE-2018-11590

Espruino before 1.99 allows attackers to cause a denial of service (application crash) with a user crafted input file via an integer overflow during syntax parsing. This was addressed by fixing stack size detection on Linux in jsutils.c.

Vulnerability class: Integer Overflow

Published 2018-05-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Espruino

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

github.com/espruino/Espruino/issues/1427 (Issue Tracking, Vendor Advisory)
github.com/espruino/Espruino/commit/a0d7f432abee692402c00e8b615ff5982dde9780 (Patch, Vendor Advisory)
github.com/espruino/Espruino/files/2019243/so_0.txt (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2018-11590?: CVE-2018-11590 is a medium-severity vulnerability in Espruino, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2018-05-31.
How severe is CVE-2018-11590?: Medium severity. CVSS v3 base score is 5.5 out of 10.