{"id":"CVE-2026-48142","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 content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","publishedAt":"2026-06-17T14:04:32.856Z","updatedAt":"2026-06-17T15:42:56.704Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","source":"f5"},"assigner":"f5","products":["F5 NGINX Open Source","F5 NGINX Plus"],"affected":[{"vendor":"F5","product":"NGINX Open Source","defaultStatus":"unknown","versions":[{"version":"1.13.10","status":"affected","lessThan":"1.31.2","versionType":"custom"},{"version":"1.30.0","status":"affected","lessThan":"1.30.3","versionType":"custom"}],"modules":["ngx_http_charset_module"]},{"vendor":"F5","product":"NGINX Plus","defaultStatus":"unaffected","versions":[{"version":"37.0","status":"affected","lessThan":"37.0.2.1","versionType":"custom"},{"version":"R36","status":"affected","lessThan":"R36 P6","versionType":"custom"}],"modules":["ngx_http_charset_module"]}],"references":["https://my.f5.com/manage/s/article/K000161585"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/48xxx/CVE-2026-48142.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-48142","state":"PUBLISHED","datePublished":"2026-06-17T14:04:32.856Z","dateUpdated":"2026-06-17T15:42:56.704Z","assignerShortName":"f5","assignerOrgId":"9dacffd4-cb11-413f-8451-fbbfd4ddc0ab","dateReserved":"2026-06-02T21:45:04.856Z"},"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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