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Response snapshot Nov 3, 2026, 20:56 UTC

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VulnerabilityCVE-2026-55409

Filament: Disabled RichEditor field state can be used for XSS

In Filament v3, a disabled RichEditor field rendered its raw state without sanitizing HTML.

At a glance

Exploited
Not known
Severity
7.6 High (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
2 independent sources

What to do

GitHub lists first patched versions: filament/forms: 3.3.53. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-m9cv-24rx-8mv7 (opens a new tab)

What happened

In Filament v3, a disabled RichEditor field rendered its raw state without sanitizing HTML. Where the data stored in this field's state isn't sanitized already when the form state was filled, an attacker could plant malicious HTML or JavaScript and achieve XSS that executes for users who view the form.

Please note that Filament v4 and above does not use the same mechanism for rendering a disabled RichEditor so this advisory does not apply.

Affected package ranges reported by GitHub: filament/forms: >= 3.0.0, <= 3.3.52

Scores and how they were measured

CVSS base severity

7.6

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-m9cv-24rx-8mv7 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-m9cv-24rx-8mv7, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  3. Primary source

    NVD CVE-2026-55409 (opens a new tab)

    NVD record: description, CVSS (the CNA score is preferred), affected products, and publication date. Not evidence of exploitation.

    Published Checked

  4. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, November 3). Filament: Disabled RichEditor field state can be used for XSS (CVE-2026-55409). https://kevwire.com/record/CVE-2026-55409

MLA

"Filament: Disabled RichEditor field state can be used for XSS (CVE-2026-55409)." KEVWire, 3 Nov. 2026, kevwire.com/record/CVE-2026-55409.

Chicago

KEVWire. "Filament: Disabled RichEditor field state can be used for XSS (CVE-2026-55409)." Last modified November 3, 2026. https://kevwire.com/record/CVE-2026-55409.

Evidence summary (plain text)

Filament: Disabled RichEditor field state can be used for XSS (Jun 17, 2026).
In Filament v3, a disabled RichEditor field rendered its raw state without sanitizing HTML. Where the data stored in this field's state isn't sanitized already when the form state was filled, an attacker could plant malicious HTML or JavaScript and achieve XSS that executes for users who view the form.

Please note that Filament v4 and above does not use the same mechanism for rendering a disabled RichEditor so this advisory does not apply.
CVSS 7.6 (version 3.1; evidence as of Nov 3, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-55409).
Sources:
GitHub-reviewed advisory GHSA-m9cv-24rx-8mv7: https://github.com/advisories/GHSA-m9cv-24rx-8mv7
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
NVD CVE-2026-55409: https://nvd.nist.gov/vuln/detail/CVE-2026-55409
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-03T19:16:00.613Z&lastModEndDate=2026-11-03T20:55:57.138Z&resultsPerPage=500&startIndex=0
Record ID: CVE-2026-55409.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Nov 3, 2026, 20:55 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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Record details

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