CVE
Progress Kendo UI for jQuery cross-site scripting in spreadsheet sheet names
- Exploited
- No known exploitation
- Fix
- Fixed in 2026.4.1111
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. The application uses Kendo UI for jQuery Spreadsheet and allows an attacker to control Spreadsheet sheet names.
- 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
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.15% · 3rd percentile
- 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? →
- 19/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- 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 Spreadsheet component has a cross-site scripting flaw in how it writes sheet names into the SheetsBar menu button. An attacker who can influence a sheet name can reach it remotely, without logging in, and run JavaScript when a user hovers over that menu button, which can expose data in the user's browser session.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
In Progress Kendo UI for jQuery, Spreadsheet sheet names are inserted into the SheetsBar menu button's data-sheet-name attribute without encoding. An attacker who can influence a sheet name can inject an event-handler attribute and execute JavaScript when a user hovers over the menu button. Successful exploitation may compromise the confidentiality and integrity of data available in the user's browser context. The first affected version is 2024.4.1112; the latest vulnerable version is 2026.3.1015. The issue is fixed in version 2026.4.1111.
Who should check
Teams running Kendo UI for jQuery with the Spreadsheet component, especially where users or outside parties can set sheet names
Read the source excerpt
“Your application may be vulnerable if it uses an affected version and allows an attacker to control Spreadsheet sheet names.”
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure12/25Specific setups only, reachable over the network without a login
- 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
What to do
Check whether your setup matches what the bug needs.
The application uses Kendo UI for jQuery Spreadsheet and allows an attacker to control Spreadsheet sheet names.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-2026-124696 (Cross-Site Scripting in Kendo UI for jQuery Spreadsheet Sheet Names), 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-2026-124696 (entry last updated 2026-11-12):
Affected:
- Progress Software Kendo UI for jQuery: from 2024.4.1112, through 2026.3.1015
Fixed versions: 2026.4.1111.
Conditions (all must be true for the bug to be hit):
- The application uses Kendo UI for jQuery Spreadsheet and allows an attacker to control Spreadsheet sheet names. (source: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-kendo-spreadsheet-sheet-names-xss-cve-2026-124696)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, no login, a user action.
CISA KEV: CVE-2026-124696 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-124696 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-kendo-spreadsheet-sheet-names-xss-cve-2026-124696
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-2026-124696
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-2026-124696"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Progress Software Kendo UI for jQuery
From 2024.4.1112 · through 2026.3.1015
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
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-2026-124696
Is CVE-2026-124696 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
What does this mean?
Sheet names in the Kendo UI for jQuery Spreadsheet are not properly sanitized, so an attacker who can control those names can run JavaScript in the browser of the user viewing the sheet. That script could reach data available in the user's browser context.Source: telerik.com
Which versions are affected by CVE-2026-124696?
Kendo UI for jQuery: from 2024.4.1112 through 2026.3.1015.Source: cve.now feed data
Am I affected, and how do I check?
Kendo UI for jQuery versions from 2024.4.1112 through 2026.3.1015 are affected, but only applications that use the Spreadsheet component and let an attacker control sheet names. To check, look at the Kendo UI for jQuery version in your project's package or dependency file and see whether the Spreadsheet component is used.Source: telerik.com
How do I fix CVE-2026-124696?
Upgrade Kendo UI for jQuery to version 2026.4.1111, which fixes the issue. No vendor patch identifiers or workaround are listed in the facts.Source: telerik.com