What is CVE-2026-97723?

CVE-2026-97723 is a medium-severity vulnerability in Madpsy Ka9q Ubersdr, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-09-25.

How severe is CVE-2026-97723?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Madpsy Ka9q Ubersdr

CVE-2026-97723

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-25.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Madpsy Ka9q Ubersdr

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/madpsy/ka9q_ubersdr/pull/114 (issue-tracking)
github.com/madpsy/ka9q_ubersdr/commit/6aa858da1c030cae11b94c7d6c72322adb9ec60d (patch)

Frequently asked questions

What is CVE-2026-97723?: CVE-2026-97723 is a medium-severity vulnerability in Madpsy Ka9q Ubersdr, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-09-25.
How severe is CVE-2026-97723?: Medium severity. CVSS v3 base score is 5.4 out of 10.