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PatchSiren cyber security CVE debrief

CVE-2026-116555 argilla-io CVE debrief

A cross-site scripting vulnerability was found in Argilla up to version 2.8.0 in the Sandbox.vue component. The vulnerability is triggered by manipulating the template argument. Remote exploitation is possible. The project was informed but has not responded yet. This vulnerability affects Argilla deployments, particularly those using versions 2.0 to 2.8.0, and defenders should assess exposure and prioritize verification and potential remediation. The exploit has been disclosed publicly, and defenders need to verify Argilla version and deployment context.

Vendor
argilla-io
Product
Argilla
CVSS
MEDIUM 4.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-26
Original CVE updated
2026-11-02
Advisory published
2026-10-26
Advisory updated
2026-11-02

Who should care

Defenders managing Argilla deployments, especially versions 2.0 to 2.8.0, should assess exposure and prioritize verification and potential remediation. This includes reviewing the current Argilla version, understanding the deployment context, and verifying exposure to the cross-site scripting vulnerability. Security teams and vulnerability management teams should also review the vulnerability and plan for potential remediation.

Why it matters

CVE-2026-116555 is a cross-site scripting vulnerability in Argilla's Sandbox.vue component. Defenders should verify exposure, especially for versions 2.0 to 2.8.0, and assess exploitation feasibility.

  • Remote exploitation is possible
  • Public exploit availability requires verification of exposure
  • Defenders need to verify Argilla version and deployment context

Technical summary

The vulnerability is located in the Sandbox.vue component of Argilla up to version 2.8.0. It allows for cross-site scripting through manipulation of the template argument. Remote exploitation is possible. The vulnerability affects Argilla deployments, particularly those using versions 2.0 to 2.8.0. Defenders should prioritize verifying exposure in their Argilla deployments and assess the feasibility of remote exploitation. Limited information is available on patched versions or workarounds. The project was informed but has not provided updates yet.

Defensive priority

Defenders should prioritize verifying exposure in their Argilla deployments, especially for versions 2.0 to 2.8.0, and assess the feasibility of remote exploitation.

Recommended defensive actions

  • Verify Argilla version and exposure
  • Assess remote exploitation feasibility
  • Monitor for public exploit usage
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was disclosed publicly, and an exploit has been made available. However, details on affected versions and remediation are limited. Defenders should verify exposure in their Argilla deployments, especially for versions 2.0 to 2.8.0, and assess the feasibility of remote exploitation. The project was informed of the problem early through an issue report but has not responded yet. Limited information is available on patched versions or workarounds.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-116555 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-116555

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-116555 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-116555

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Argilla Sandbox.vue cross site scripting

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/116xxx/CVE-2026-116555.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/426456

    Supplemental source - vdb-entry, technical-description

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/426456/cti

    Supplemental source - signature, permissions-required

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/cve/CVE-2026-116555

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/submit/1022936

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://github.com/argilla-io/argilla/issues/5876

    Supplemental source - issue-tracking

  • Source reference

    Unverified legacy reference

    URL: https://github.com/3em0/cve_repo/tree/main/2026/argilla-io.argilla_stored_xss_custom_field_iframe/poc

    Supplemental source - exploit

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.