CVE-2026-97723: Madpsy KA9Q Ubersdr

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

madpsy ka9q_ubersdr before 0.1.58 has a stored cross-site scripting (XSS) vulnerability in the chat message rendering functionality. User-controlled URLs in chat messages were insufficiently neutralized before being converted into HTML links. Quotation characters could break out of the generated href attribute and introduce attacker-controlled HTML attributes, allowing arbitrary JavaScript to execute in the browser of another user when the stored chat message was rendered. No click on the malicious link was required.

Affected products

• Madpsy KA9Q Ubersdr: before 0.1.58 (fixed in 0.1.58)

Published 2026-09-25. Last modified 2026-09-30.