Detections
Analytics

Nginx 1.31.x < 1.31.6 Heap-Based Buffer Overflow

medium Web App Scanning Plugin ID 115478

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Synopsis

Nginx 1.31.x < 1.31.6 Heap-Based Buffer Overflow

Description

According to its banner, the version of Nginx running on the remote host is prior to 1.30.5 or 1.31.x prior to 1.31.6. It is, therefore, affected by a heap-based buffer overflow vulnerability in the ngx_http_v3_module module that occurs when HTTP/3 is used with OpenSSL 3.5.0 and earlier under certain configurations, which can cause a limited heap buffer overflow in the NGINX worker process during a TLS handshake, potentially leading to a denial of service (DoS) or limited data corruption.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Nginx version 1.31.6 or later.

See Also

https://my.f5.com/manage/s/article/K000162604

https://nginx.org/en/CHANGES

https://nginx.org/en/CHANGES-1.30

Plugin Details

Severity: Medium

ID: 115478

Type: Version Based

Published: 9/23/2026

Updated: 9/23/2026

Scan Template: api, basic, full, pci, scan

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 8.06

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2026-90439

CVSS v3

Risk Factor: Medium

Base Score: 6.5

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

CVSS Score Source: CVE-2026-90439

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-90439

Vulnerability Information

CPE: cpe:2.3:a:nginx:nginx:*:*:*:*:*:*:*:*

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-90439