{"id":"CVE-2026-6994","state":"PUBLISHED","title":"Envoy Query Parameter header_mutation.cc params.add injection","description":"A weakness has been identified in Envoy up to 1.33.0. Affected is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. This manipulation causes injection. Remote exploitation of the attack is possible. Patch name: f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4. It is suggested to install a patch to address this issue.","publishedAt":"2026-04-25T19:00:19.151Z","updatedAt":"2026-04-27T17:17:35.083Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X","source":"VulDB"},"assigner":"VulDB","products":["n/a Envoy"],"affected":[{"vendor":"n/a","product":"Envoy","versions":[{"version":"1.0","status":"affected"},{"version":"1.1","status":"affected"},{"version":"1.2","status":"affected"},{"version":"1.3","status":"affected"},{"version":"1.4","status":"affected"},{"version":"1.5","status":"affected"},{"version":"1.6","status":"affected"},{"version":"1.7","status":"affected"},{"version":"1.8","status":"affected"},{"version":"1.9","status":"affected"},{"version":"1.10","status":"affected"},{"version":"1.11","status":"affected"},{"version":"1.12","status":"affected"},{"version":"1.13","status":"affected"},{"version":"1.14","status":"affected"},{"version":"1.15","status":"affected"},{"version":"1.16","status":"affected"},{"version":"1.17","status":"affected"},{"version":"1.18","status":"affected"},{"version":"1.19","status":"affected"},{"version":"1.20","status":"affected"},{"version":"1.21","status":"affected"},{"version":"1.22","status":"affected"},{"version":"1.23","status":"affected"},{"version":"1.24","status":"affected"},{"version":"1.25","status":"affected"},{"version":"1.26","status":"affected"},{"version":"1.27","status":"affected"},{"version":"1.28","status":"affected"},{"version":"1.29","status":"affected"},{"version":"1.30","status":"affected"},{"version":"1.31","status":"affected"},{"version":"1.32","status":"affected"},{"version":"1.33.0","status":"affected"}],"modules":["Query Parameter Handler"]}],"references":["https://vuldb.com/vuln/359546","https://vuldb.com/vuln/359546/cti","https://vuldb.com/submit/797241","https://github.com/envoyproxy/envoy/pull/43502/","https://github.com/envoyproxy/envoy/commit/f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4"],"weaknesses":["CWE-74","CWE-707"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6994.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6994","state":"PUBLISHED","datePublished":"2026-04-25T19:00:19.151Z","dateUpdated":"2026-04-27T17:17:35.083Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-04-24T19:49:39.070Z"},"containers":{"cna":{"title":"Envoy Query Parameter header_mutation.cc params.add injection","descriptions":[{"lang":"en","value":"A weakness has been identified in Envoy up to 1.33.0. Affected is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. This manipulation causes injection. Remote exploitation of the attack is possible. Patch name: f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4. 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