CVE Tracker

CVE-2026-93479

A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and the r…

A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and the root directive or access log format 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.

Vendor

Unknown

Product

Unknown

CVSS 3.1

8.1 (high), scored by f5sirt@f5.com (primary)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

9.2 (critical), scored by f5sirt@f5.comCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE

CWE-122

Published

2026-10-14

NVD modified

2026-10-14

NVD status

Awaiting Analysis

Not in the CISA KEV catalogue at the last update.

Data last updated 15 Oct 2026. Sources: NVD API 2.0. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.