# CVE-2026-115748: Apache Vysper: Authorization bypass

Status: published. Published: 2026-10-26. Updated: 2026-11-02.

**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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Apache Software Foundation / Apache Vysper (org.apache.vysper:vysper): ≥ 0; ≤ * (affected, maven). Source: CNA: apache

## Severity and prioritization

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: apache

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: security@apache.org

- CISA KEV: No listing in collected sources

- EPSS: 0.61% as of 2026-11-02; percentile 49.38%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://mina.apache.org/vysper-project/ (CNA: apache)

- https://lists.apache.org/thread.html/979n9lzg10vc7tdrrlgy4lh5yrsw8wsj (CNA: apache; vendor-advisory)

- http://www.openwall.com/lists/oss-security/2026/10/23/21 (ADP: CVE)

- https://lists.apache.org/thread.html/979n9lzg10vc7tdrrlgy4lh5yrsw8wsj (security@apache.org)

- https://mina.apache.org/vysper-project/ (security@apache.org)

- http://www.openwall.com/lists/oss-security/2026/10/23/21 (af854a3a-2127-422b-91ae-364da2661108)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-115748; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-115748; retrieved 2026-11-03; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115748; retrieved 2026-11-02; source updated Not reported

Revision: 0f12a3586ddf8bb9f3e89c8558ee1c96d1e80b3540b975bc6293dd091d80c249

Canonical: https://y2.dev/cve/CVE-2026-115748

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