What is CVE-2026-115748?

CVE-2026-115748 is a high-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-10-26.

How severe is CVE-2026-115748?

High severity. CVSS v3 base score is 8.8 out of 10.

CVE-2026-115748

CVE-2026-115748

**UNSUPPORTED WHEN ASSIGNED** Authorization bypass in Apache Vysper, all versions. Apache Vysper is an XMPP (Jabber) server library. Its XEP-0077 (In-Band Registration) implementation is missing an authentication check, allowing any authenticated user to compromise other accounts. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-10-26 · last modified 2026-10-26.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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.

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2026-115748?: CVE-2026-115748 is a high-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-10-26.
How severe is CVE-2026-115748?: High severity. CVSS v3 base score is 8.8 out of 10.