CVE
Cross-Site Scripting via the spriteCssClass Field in Kendo UI for jQuery
- Exploited
- No known exploitation
- Fix
- Fixed in 2026.4.1111
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 2026.4.1111.
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- 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? →
- 14/100 · provisional
- 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
Progress Software's Kendo UI for jQuery is affected, specifically the TabStrip, PanelBar, and Menu widgets when they map a data field to spriteCssClass. An attacker can reach this remotely, without logging in, by controlling the mapped data so it injects script that runs when a victim loads a page that renders the widget, with access to whatever the victim's authenticated session can do.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
In Progress® Kendo® UI for jQuery prior to 2026.4.1111 the TabStrip, PanelBar, and Menu widgets support mapping a dataSource field to spriteCssClass. If an attacker can control the mapped data, they can break out of the attribute and inject markup, including event-handler attributes. The resulting JavaScript executes in the application's origin when a victim loads a page that renders the affected widget, allowing access to data and actions available in the victim's authenticated session.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure7/25Reachable over the network without a login · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.1/10CVSS 7.1
- No patch0/5No signal
What would change the score
- Would score about 69 if added to CISA KEV
- Would score about 64 if CISA's SSVC rates exploitation active
- Would score about 29 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 2026.4.1111.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-124688 (Cross-Site Scripting via the spriteCssClass Field in Kendo UI for jQuery), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-124688 (entry last updated 2026-11-11):
Affected:
- Progress Software Kendo UI for jQuery: from 2012.1.322, fixed in 2026.4.1111
Fixed versions: 2026.4.1111.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-124688 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-124688 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-tabstrip-panelbar-menu-spritecssclass-xss-cve-2026-124688
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-124688
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-124688"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Progress Software Kendo UI for jQuery
From 2012.1.322 · fixed in 2026.4.1111
Evidence 3
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124688
Is CVE-2026-124688 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-2026-124688?
Kendo UI for jQuery: from 2012.1.322 before 2026.4.1111.Source: cve.now feed data
How do I fix CVE-2026-124688?
Upgrade to a fixed version: 2026.4.1111.Source: cve.now feed data