CVE-2026-45697Network attack vector

Unauthenticated Twig execution via Hidden field values

Published May 29, 2026 · Updated May 29, 2026

Server-side template injection in Verbb Formie before 2.2.20 or 3.0.0-beta.1 through 3.1.23 allows remote attackers to execute Twig via form input. Hidden::serializeValue passed submitted nonempty Hidden values to Variables::getParsedValue, causing attacker-controlled Twig syntax to be evaluated. A public form with a Hidden field whose default is Custom is required; no control-panel login is needed, and site compromise depends on Twig sandbox behavior.

CVSS severity9.8
Critical
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Verbb Formie before 2.2.20 or 3.0.0-beta.1 through 3.1.23 allows remote attackers to execute Twig via form input. Hidden::serializeValue passed submitted nonempty Hidden values to Variables::getParsedValue, causing attacker-controlled Twig syntax to be evaluated. A public form with a Hidden field whose default is Custom is required; no control-panel login is needed, and site compromise depends on Twig sandbox behavior.

The record

CVE
CVE-2026-45697
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Verbb
Product
Formie
Classifications
CWE-1336, CWE-693, CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.2.20
  2. Affected versionversion=>= 3.0.0-beta.1, < 3.1.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Verbb · Formieversion=< 2.2.20; version=>= 3.0.0-beta.1, < 3.1.24

Published CVSS scores

9.8GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-693Protection Mechanism Failure
CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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