{"schema_version":1,"title":"GCHQ vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in GCHQ: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-57439, was published on 8 July 2026. 1 technology has a page of its own.","url":"https://junglewise.ai/threats/vendors/gchq","json_url":"https://junglewise.ai/threats/vendors/gchq.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/vendors/gchq","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"vendor","counts":{"high":1,"all_time":3,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":1,"last_365_days":2},"latest":[{"cve":"CVE-2026-57439","cvss":5,"epss":0.0024,"slug":"cve-2026-57439-gchq-cyberchef-prototype-pollution-in-series-chart-operation","title":"GCHQ CyberChef prototype pollution in Series Chart operation","severity":"medium","exploited":false,"published_at":"2026-07-08T16:16:31.28+00:00","url":"https://junglewise.ai/threats/cve-2026-57439-gchq-cyberchef-prototype-pollution-in-series-chart-operation"},{"cve":"CVE-2026-42615","cvss":7.2,"epss":0.0037,"slug":"cve-2026-42615-gchq-cyberchef-xss-in-show-base64-offsets-operation","title":"GCHQ CyberChef XSS in Show Base64 offsets operation","severity":"high","exploited":false,"published_at":"2026-04-29T04:16:41.75+00:00","url":"https://junglewise.ai/threats/cve-2026-42615-gchq-cyberchef-xss-in-show-base64-offsets-operation"},{"cve":"CVE-2019-15532","cvss":3,"epss":0.0131,"slug":"cve-2019-15532-cyberchef-cross-site-scripting-in-text-encoding-brute-force","title":"CyberChef cross-site scripting in Text Encoding Brute Force","severity":"low","exploited":false,"published_at":"2019-08-27T17:36:32+00:00","url":"https://junglewise.ai/threats/cve-2019-15532-cyberchef-cross-site-scripting-in-text-encoding-brute-force"}],"vendor":{"hub":true,"name":"GCHQ","slug":"gchq","homepage":"https://www.gchq.gov.uk/","description":"Government Communications Headquarters is an intelligence and security organisation responsible for providing signals intelligence and information assurance to the government and armed forces of the United Kingdom.","url":"https://junglewise.ai/threats/vendors/gchq"},"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"most_severe":[{"cve":"CVE-2026-42615","cvss":7.2,"epss":0.0037,"slug":"cve-2026-42615-gchq-cyberchef-xss-in-show-base64-offsets-operation","title":"GCHQ CyberChef XSS in Show Base64 offsets operation","severity":"high","exploited":false,"published_at":"2026-04-29T04:16:41.75+00:00","url":"https://junglewise.ai/threats/cve-2026-42615-gchq-cyberchef-xss-in-show-base64-offsets-operation"},{"cve":"CVE-2026-57439","cvss":5,"epss":0.0024,"slug":"cve-2026-57439-gchq-cyberchef-prototype-pollution-in-series-chart-operation","title":"GCHQ CyberChef prototype pollution in Series Chart operation","severity":"medium","exploited":false,"published_at":"2026-07-08T16:16:31.28+00:00","url":"https://junglewise.ai/threats/cve-2026-57439-gchq-cyberchef-prototype-pollution-in-series-chart-operation"},{"cve":"CVE-2019-15532","cvss":3,"epss":0.0131,"slug":"cve-2019-15532-cyberchef-cross-site-scripting-in-text-encoding-brute-force","title":"CyberChef cross-site scripting in Text Encoding Brute Force","severity":"low","exploited":false,"published_at":"2019-08-27T17:36:32+00:00","url":"https://junglewise.ai/threats/cve-2019-15532-cyberchef-cross-site-scripting-in-text-encoding-brute-force"}],"generated_at":"2026-09-28T03:07:00.154823+00:00","technologies":[{"name":"GCHQ CyberChef","slug":"cyberchef","vulnerabilities":3,"url":"https://junglewise.ai/threats/technologies/cyberchef"}]}