Vulnerability · Published Nov 4, 2026 · Assigned by VulnCheck

CVE-2026-122234jsondiffpatch before 0.7.7 XSS via Array-Move Destination in HTML Formatters

Medium 4.7

In plain English

A medium-severity cross-site scripting in jsondiffpatch from benjamine. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)0.2%top 92.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

jsondiffpatch before 0.7.7 contains a cross-site scripting vulnerability that allows attackers to inject markup by supplying an unescaped array-move destination index in a delta. Attackers who control a delta passed to formatters.html.format() or formatters.annotated.format() can embed script that executes in the application's origin when output is rendered.

Affected products (as reported)

Vendor	Product	Versions
benjamine	jsondiffpatch	0 – before 0.7.7

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-jhmf-rq89-q58p) vendor-advisory
https://github.com/benjamine/jsondiffpatch/commit/c6b2d97b34bc2356c816d8dd0f8b1c8af16bb6af patch
VulnCheck Advisory: jsondiffpatch before 0.7.7 XSS via Array-Move Destination in HTML Formatters third-party-advisory