CVE-2026-42533

Katalog CVE

CVSS 8.1 · High EPSS 0,89%

Kerentanan Heap-based Buffer Overflow pada f5 nginx gateway fabric, f5 nginx ingress controller +2 lainnya. Skor CVSS 3.1 8.1 (High) menurut f5.com.

Deskripsi (NVD)

A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. There is no control plane exposure; this is a data plane issue only.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Rincian

Terbit di NVD

15 Juli 2026

Terakhir diubah

10 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

8.1 (High), sumber f5.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-122: Heap-based Buffer Overflow

EPSS (30 hari)

0,89% peluang dieksploitasi; lebih tinggi dari 58,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://my.f5.com/manage/s/article/K000162097 advisory vendor