{"id":"CVE-2026-42615","details":"GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.","aliases":["GHSA-h4hv-92pp-pcjg"],"modified":"2026-07-15T01:49:06.994639053Z","published":"2026-04-29T02:55:53.171Z","database_specific":{"cna_assigner":"mitre","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42615.json"},"references":[{"type":"WEB","url":"https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42615.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42615"},{"type":"REPORT","url":"https://github.com/gchq/CyberChef/issues/2344"},{"type":"FIX","url":"https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d"},{"type":"FIX","url":"https://github.com/gchq/CyberChef/pull/2346"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gchq/cyberchef","events":[{"introduced":"0"},{"fixed":"8de0ded56cfd59c284573faa4767e5d55733cc57"},{"fixed":"9641ae07f92e9af50f10e978385465b2f4a36c4d"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"11.0.0"}]}}],"versions":["v10.24.0","v10.23.0","v10.22.1","v10.22.0","v10.21.0","v10.20.0","v10.19.4","v10.19.2","v10.19.3","v10.19.1","v10.18.9","v10.18.8","v10.18.7","v10.18.6","v10.18.5","v10.18.4","v10.18.3","v10.18.2","v10.18.1","v10.18.0","v10.17.1","v10.17.0","v10.16.0","v10.15.1","v10.15.0","v10.14.0","10.14.0","v10.13.0","v10.12.1","v10.12.0","v10.11.0","v10.10.0","v10.9.0","v10.8.2","v10.8.1","v10.8.0","v10.5.2","v10.7.0","v10.6.0","10.6.0","v10.5.1","v10.5.0","v10.4.0","v10.3.0","v10.2.0","v10.1.0","v10.0.1","v10.0.0","v9.28.0","v9.39.1","v9.38.6","v9.39.0","v9.38.9","v9.38.8","v9.38.7","v9.38.5","v9.38.4","v9.38.3","v9.38.2","v9.38.1","v9.38.0","v9.37.3","v9.37.2","v9.37.1","v9.37.0","v9.36.1","v9.36.0","v9.35.1","v9.35.0","v9.34.2","v9.34.1","v9.34.0","v9.33.1","v9.33.0","v9.32.3","v9.32.2","v9.32.1","v9.32.0","v9.31.0","v9.30.0","v9.29.2","v9.29.1","v9.29.0","v9.27.6","v9.27.5","v9.27.4","v9.27.3","v9.27.2","v9.27.1","v9.27.0","v9.26.3","v9.26.2","v9.26.1","v9.26.0","v9.25.0","v9.24.8","v9.24.7","v9.24.6","v9.24.5","v9.24.4","v9.24.3","v9.24.2","v9.24.1","v9.24.0","v9.23.1","v9.23.0","v9.22.4","v9.22.3","v9.22.2","v9.22.1","v9.22.0","v9.21.6","v9.21.5","v9.21.4","v9.21.3","v9.21.2","v9.21.1","v9.21.0","v9.20.7","v9.20.6","v9.20.5","v9.20.4","v9.8.0","v9.7.20","v9.7.19","v9.7.18","v9.7.17","v9.7.16","v9.7.15","v9.7.14","v9.7.13","v9.7.12","v9.7.11","v9.7.10","v9.7.9","v9.7.8","v9.7.7","v9.7.6","v9.7.5","v9.7.4","v9.5.0","v9.6.0","v9.4.1","v9.4.0","v9.3.0","v9.2.3","v9.2.2","v9.2.0","v9.2.1","v9.1.0","v9.0.10","v9.0.8","v9.0.7","v9.0.6","v9.0.5","v9.0.4","v9.0.3","v9.0.2","v9.0.1","v9.0.0","v7.9.0","v7.8.1","v7.8.0","v7.7.8","v7.7.7","v7.7.6","v7.7.5","v7.7.4","v7.7.3","v7.7.2","v7.7.1","v7.7.0","v7.6.3","v7.6.2","v7.6.1","v7.6.0","v7.5.6","v7.5.5","v7.5.4","v7.5.3","v7.5.2","v7.5.0","v7.4.0","v7.3.0","v7.2.3","v7.2.2","v7.2.1","v7.2.0","v7.1.0","v7.0.0","v6.8.0","v6.7.2","v6.7.1","v6.7.0","v6.6.3","v6.6.2","v6.6.1","v6.6.0","v6.5.0","v6.4.6","v5.16.3","v6.4.5","v6.4.4","v6.3.1","v6.4.3","v6.4.2","v6.4.1","v6.3.2","v6.3.0","v6.2.1","v6.2.0","v6.1.0","v6.0.1","v5.20.0","v6.0.0","v5.19.3","v5.19.2","v5.19.1","v5.19.0","v5.18.1","v5.18.0","v5.17.0","v5.16.2","v5.16.1","v5.16.0","v5.15.0","v5.14.0","v5.13.1","v5.13.0","v5.12.4","v5.12.3","v5.12.1","v5.12.0","v5.11.7","v5.11.6","v5.11.5","v5.11.4","v5.11.3","v5.11.2","v5.11.1","v5.11.0","v5.10.7","v5.10.6","v5.10.5","v5.10.4","v5.10.3","v5.10.2","v5.10.1","v5.10.0","v5.9.2","v5.9.1","v5.9.0","v5.8.0","v5.7.3","v5.7.2","v5.7.1","v5.7.0","v5.6.0","v5.5.0","v5.4.1","v5.4.0","v5.3.5","v5.3.4","v5.3.3","v5.3.2","v5.3.1","v5.3.0","v5.2.4","v5.2.3","v5.2.2","v5.2.1","v5.2.0","v5.1.3","v5.1.2","v5.1.1","v5.1.0","v5.0.1","v5.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42615.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"}]}