What is CVE-2026-122234?

CVE-2026-122234 is a medium-severity vulnerability in Benjamine Jsondiffpatch, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-11-04.

How severe is CVE-2026-122234?

Medium severity. CVSS v3 base score is 4.7 out of 10.

XSS in Benjamine Jsondiffpatch

CVE-2026-122234

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-11-04.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Benjamine Jsondiffpatch

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/benjamine/jsondiffpatch/commit/c6b2d97b34bc2356c816d8dd0f8b1c8af16bb… (patch)
GitHub Security Advisory (GHSA-jhmf-rq89-q58p) (vendor-advisory)
VulnCheck Advisory: jsondiffpatch before 0.7.7 XSS via Array-Move Destination in HTML Formatters (third-party-advisory)

Frequently asked questions

What is CVE-2026-122234?: CVE-2026-122234 is a medium-severity vulnerability in Benjamine Jsondiffpatch, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-11-04.
How severe is CVE-2026-122234?: Medium severity. CVSS v3 base score is 4.7 out of 10.