Medium severity4.8NVD Advisory· Published May 13, 2026· Updated May 13, 2026
CVE-2026-42934
CVE-2026-42934
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.
Affected products
13- osv-coords11 versionspkg:bitnami/nginxpkg:bitnami/nginx-gatewaypkg:rpm/opensuse/nginx&distro=openSUSE%20Tumbleweedpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/nginx&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5
>= 0.3.50, < 1.30.1+ 10 more
- (no CPE)range: >= 0.3.50, < 1.30.1
- (no CPE)range: >= 0.3.50, < 1.30.1
- (no CPE)range: < 1.31.0-1.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
- (no CPE)range: < 1.21.5-150400.3.20.1
Patches
Vulnerability mechanics
References
1News mentions
2- 18-year-old NGINX vulnerability allows DoS, potential RCEBleepingComputer · May 14, 2026
- 18-Year-Old NGINX Rewrite Module Flaw Enables Unauthenticated RCEThe Hacker News · May 14, 2026