Improper Neutralization of Special Elements Used in a Template Engine Affecting verbb/formie package, versions >=3.0.0-beta.1, <3.1.27
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-VERBBFORMIE-17824431
- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-52889 (opens in a new tab)How to fix?
Upgrade verbb/formie to version 3.1.27 or higher.
Overview
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine via the Hidden::getFrontEndInputOptions process. An attacker can execute arbitrary code, access sensitive information, or modify application state by supplying specially crafted input that is evaluated server-side during form rendering. This is only exploitable if a public form contains a Hidden field configured with a request-derived default value such as HTTP User Agent, Referer URL, Current URL, Query Parameter, or Cookie Value.
Workaround
This vulnerability can be mitigated by avoiding the use of request-derived Hidden field defaults on public forms or by removing affected Hidden fields from public forms until the update is applied.