Technology · GCHQ
GCHQ CyberChef vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 3 vulnerabilities in GCHQ CyberChef: 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.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 0
- Exploited in the wild
- 0
About GCHQ CyberChef
CyberChef is a simple, intuitive web app for carrying out all manner of cyber operations within a web browser.
Latest GCHQ CyberChef vulnerabilities
- CVE-2026-57439: GCHQ CyberChef prototype pollution in Series Chart operationmediumCVSS 5EPSS 0.2%
- CVE-2026-42615: GCHQ CyberChef XSS in Show Base64 offsets operationhighCVSS 7.2EPSS 0.4%
- CVE-2019-15532: CyberChef cross-site scripting in Text Encoding Brute ForcelowCVSS 3EPSS 1.3%
Most severe GCHQ CyberChef vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-42615: GCHQ CyberChef XSS in Show Base64 offsets operationhighCVSS 7.2EPSS 0.4%
- CVE-2026-57439: GCHQ CyberChef prototype pollution in Series Chart operationmediumCVSS 5EPSS 0.2%
- CVE-2019-15532: CyberChef cross-site scripting in Text Encoding Brute ForcelowCVSS 3EPSS 1.3%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 1 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/cyberchef.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "GCHQ CyberChef vulnerabilities", https://junglewise.ai/threats/technologies/cyberchef, 26 September 2026.