CVE-2026-57439Published

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 o…

Exact source revision recorded 27 Oct 2026 15:15:28 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

nvd · CVE-2026-57439

Published

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.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-79 · CWE-1321

Original publisher date fields

published: 2026-07-08T16:16:31.280

lastModified: 2026-10-25T20:10:00.147

Source published: 8 Jul 2026 16:16:31 UTC
Source modified: 25 Oct 2026 20:10:00 UTC
Observed here: 27 Oct 2026 15:15:28 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 5.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N