What is CVE-2019-13067?

CVE-2019-13067 is a critical-severity vulnerability in F5 Njs, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-06-30.

How severe is CVE-2019-13067?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Out-of-bounds Read in F5 Njs

CVE-2019-13067

njs through 0.3.3, used in NGINX, has a buffer over-read in nxt_utf8_decode in nxt/nxt_utf8.c. This issue occurs after the fix for CVE-2019-12207 is in place.

Vulnerability class: Buffer Overflow

Published 2019-06-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

F5 Njs

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/nginx/njs/issues/183 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2019-13067?: CVE-2019-13067 is a critical-severity vulnerability in F5 Njs, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-06-30.
How severe is CVE-2019-13067?: Critical severity. CVSS v3 base score is 9.8 out of 10.