woylie doggo up to 0.14.7 Date Field lib/doggo.ex Doggo.normalize_value cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in woylie doggo up to 0.14.7. Affected is the function Doggo.normalize_value of the file lib/doggo.ex of the component Date Field. The manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-66353. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in woylie doggo up to 0.14.7. It has been classified as problematic. Affected is the function Doggo.normalize_value of the file lib/doggo.ex of the component Date Field. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in woylie doggo allows Reflected XSS. Doggo.normalize_value/2 in lib/doggo.ex returned date field values wrapped in {:safe, ...}, the Phoenix.HTML marker meaning "already escaped, emit verbatim", without escaping them, so the value reached the value attribute of the <input> rendered by the field component unchanged. Any application rendering <.field type="date"> over user-controlled params is affected through the ordinary Phoenix form round-trip, where a failed validation re-renders the submitted value. The pattern kept exactly the first ten bytes and discarded shorter values, capping a payload at ten bytes: enough to terminate the attribute and open an element or attach a short event handler, not enough to place attacker-chosen script inline. Only type="date" is affected. This issue affects doggo: from 0.1.0 before 0.14.8.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-66353 since 08/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 0.14.8 eliminates this vulnerability.

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Productinfo

Vendor

• woylie

Name

• doggo

Version

• 0.14.0
• 0.14.1
• 0.14.2
• 0.14.3
• 0.14.4
• 0.14.5
• 0.14.6
• 0.14.7

Website

• Product: https://github.com/woylie/doggo/

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