Medium severity5.0NVD Advisory· Published Jul 8, 2026· Updated Jul 10, 2026
CVE-2026-57439
CVE-2026-57439
Description
CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts __proto__ as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
cyberchefnpm | < 11.2.0 | 11.2.0 |
Affected products
2Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-fx6f-382r-j72cghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-57439ghsaADVISORY
- github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948fnvdWEB
- github.com/gchq/CyberChef/issues/2568nvdWEB
- github.com/gchq/CyberChef/pull/2569nvdWEB
- github.com/gchq/CyberChef/releases/tag/v11.2.0nvdWEB
- github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72cnvdWEB
News mentions
0No linked articles in our index yet.