What is CVE-2026-27784?

CVE-2026-27784 is a high-severity vulnerability in F5 Nginx Open Source, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-03-24.

How severe is CVE-2026-27784?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in F5 Nginx Open Source

CVE-2026-27784

The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4…

Vulnerability class: Integer Overflow

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

F5 Nginx Open Source — versions 1.29.0, 1.1.19

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

my.f5.com/manage/s/article/K000160364 (vendor-advisory)

Frequently asked questions

What is CVE-2026-27784?: CVE-2026-27784 is a high-severity vulnerability in F5 Nginx Open Source, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-03-24.
How severe is CVE-2026-27784?: High severity. CVSS v3 base score is 7.8 out of 10.