Is CVE-2026-42934 actively exploited?

No active exploitation of CVE-2026-42934 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42934 be exploited remotely?

Yes. CVE-2026-42934 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42934?

CVE-2026-42934 has a CVSS score of 4.8 (MEDIUM).

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MEDIUM

CVE-2026-42934

CWE-125Published: May 13, 2026· Updated: May 13, 2026

4.8

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:10.4th

Official Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

NVD Source

Technical Analysis

CVE-2026-42934 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.