jsondiffpatch before 0.7.7 XSS via Array-Move Destination in HTML Formatters
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 0.7.7
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 0.7.7.
- Exploitation?/40Exploitation: unknown (data gap). No CISA SSVC exploitation rating yet
- Exposure7/25Reachable over the network without a login · Data gap: No advisory context yet
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity2.3/10CVSS 2.3
- No patch0/5No signal
What would change the score
- Would score about 64 if added to CISA KEV
- Would score about 59 if CISA's SSVC rates exploitation active
- Would score about 24 if advisories confirm default setups are exposed
CVE-2026-122234 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 2.3 (low) and affects jsondiffpatch; fixed in 0.7.7.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 9/100 · provisional
- Fix
- Fixed in 0.7.7
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
jsondiffpatch versions before 0.7.7 contain a cross-site scripting flaw in its HTML and annotated formatters, which let an attacker inject script through an unescaped array-move destination index in a delta. An attacker can reach it remotely, without logging in, but a user must take an action, such as viewing the rendered output, before the injected script runs in the application's origin.
Read the original 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.
What to do
Upgrade to a fixed version: 0.7.7.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- benjamine jsondiffpatch
fixed in 0.7.7
Evidence 3
- Advisory
- Patch
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-122234
Is CVE-2026-122234 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-122234?
jsondiffpatch: before 0.7.7.Source: cve.now feed data
How do I fix CVE-2026-122234?
Upgrade to a fixed version: 0.7.7.Source: cve.now feed data