{"id":"CVE-2026-42934","state":"PUBLISHED","title":"NGINX ngx_http_charset_module vulnerability","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.\n\n\n\n Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","publishedAt":"2026-05-13T14:12:44.331Z","updatedAt":"2026-06-08T20:34:05.147Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","source":"f5"},"assigner":"f5","products":["F5 NGINX Plus","F5 NGINX Open Source"],"affected":[{"vendor":"F5","product":"NGINX Plus","defaultStatus":"unknown","versions":[{"version":"R37","status":"unaffected","lessThan":"*","versionType":"custom"},{"version":"R36","status":"affected","lessThan":"R36 P4","versionType":"custom"},{"version":"R32","status":"affected","lessThan":"R32 P6","versionType":"custom"}],"modules":["ngx_http_charset_module"]},{"vendor":"F5","product":"NGINX Open Source","defaultStatus":"unaffected","versions":[{"version":"1.31.0","status":"unaffected","lessThan":"*","versionType":"semver"},{"version":"0.3.50","status":"affected","lessThan":"1.30.1","versionType":"semver"}],"modules":["ngx_http_charset_module"]}],"references":["https://my.f5.com/manage/s/article/K000161028"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42934.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42934","state":"PUBLISHED","datePublished":"2026-05-13T14:12:44.331Z","dateUpdated":"2026-06-08T20:34:05.147Z","assignerShortName":"f5","assignerOrgId":"9dacffd4-cb11-413f-8451-fbbfd4ddc0ab","dateReserved":"2026-04-30T23:04:27.960Z"},"containers":{"cna":{"title":"NGINX ngx_http_charset_module vulnerability","descriptions":[{"lang":"en","value":"NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. 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