CVE-2026-66353
Medium · CVSS 5.3Published 2026-08-27
CVSS
5.3
Medium
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-66353?
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.
CVSS Score Explained
CVSS 5.3 is Medium severity. Exploitation usually requires some specific conditions (local access, user interaction, or a particular config). Still worth patching in your next maintenance window.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://cna.erlef.org/cves/CVE-2026-66353.html
- ›https://github.com/woylie/doggo/commit/0161c976a114a4a4faee22d599b3fd5f147fc443
- ›https://github.com/woylie/doggo/security/advisories/GHSA-w9rp-cf93-86pj
- ›https://osv.dev/vulnerability/EEF-CVE-2026-66353
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