CVE-2019-12207

9.8 criticalEPSS 1.8%

Critical (9.8) in f5 njs. EPSS 1.8% chance of exploitation in the next 30 days.

njs through 0.3.1, used in NGINX, has a heap-based buffer over-read in nxt_utf8_decode in nxt/nxt_utf8.c.

Severity

9.8 critical

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

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
CWE: CWE-125
Published: 2019-05-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19