SB2026080457 - SUSE update for nginx

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Main Vulnerability Database SB2026080457

SB2026080457 - SUSE update for nginx

Published: August 4, 2026

Security Bulletin ID SB2026080457
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Heap-based buffer overflow (CVE-ID: CVE-2026-42533)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code or cause a denial of service.

The vulnerability exists due to heap-based buffer overflow in the map directive with regex matching when processing crafted HTTP requests that trigger regex capture variable references before the map output variable. A remote attacker can send crafted HTTP requests to execute arbitrary code or cause a denial of service.

Code execution is possible on systems with ASLR disabled or when ASLR can be bypassed. This is a data plane issue only.


Remediation

Install update from vendor's website.

References