CVE-2026-39823

Severity CVSS v4.0:

Pending analysis

Type:

CWE-79 Cross-Site Scripting (XSS)

Publication date:

07/05/2026

Last modified:

13/05/2026

Description

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a tag&#39;s attribute. If the URL content were to insert ASCII whitespaces around the &#39;=&#39; rune inside of the attribute, the escaper would fail to similarly escape it, leading to XSS.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None