Threats Tagged 'cve-2026-42533'

Red Hat Cost Management On-Premise provides cost visibility and analysis for on-premise OpenShift environments. This update includes the latest bug fixes and enhancements.

This update for nginx fixes the following issue - CVE-2026-42533: map directive and regex matching vulnerability (bsc#1271514).

A security update for Red Hat Hardened Images RPMs addresses multiple vulnerabilities in nginx, including CVE-2026-42533 related to the map directive and regex matching, and CVE-2026-56434 involving a heap buffer over-read in the ngx_http_ssi_module. These vulnerabilities can lead to memory modification or denial of service. The update is available for various nginx packages distributed by Red Hat and SUSE. Users are advised to apply the update to mitigate these issues.

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.