# cyberchef (npm) vulnerabilities

3 known vulnerabilities (1 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Weekly downloads: 3,282
- Dependents: 0
- Registry: https://www.npmjs.com/package/cyberchef

## Advisories (3)

### [CVE-2026-57439](https://cve.now/CVE-2026-57439): CyberChef: Prototype pollution in Series Chart operation

- Severity: Medium 5.0
- Published: Jul 8, 2026
- Affected: fixed in 11.2.0.

### [CVE-2026-42615](https://cve.now/CVE-2026-42615): GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show\_Base64\_offsets('%3Cscript substring.

- Severity: High 7.2
- Published: Apr 29, 2026
- Affected: fixed in 11.0.0.

### [CVE-2019-15532](https://cve.now/CVE-2019-15532): CyberChef before 8.31.2 allows XSS in core/operations/TextEncodingBruteForce.mjs.

- Severity: Unrated
- Published: Aug 26, 2019
- Affected: fixed in 8.31.3.

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