CVE-2019-11839

9.8 criticalEPSS 1.6%

Critical (9.8) in f5 njs. EPSS 1.6% chance of exploitation in the next 30 days.

njs through 0.3.1, used in NGINX, has a heap-based buffer overflow in Array.prototype.push after a resize, related to njs_array_prototype_push in njs/njs_array.c, because of njs_array_expand size mishandling.

Severity

CVSS 3.0

9.8 critical

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.6% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2019-05-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

f5:njs

References

https://github.com/nginx/njs/issues/152
https://github.com/nginx/njs/issues/152

Check your stack JSON