TI-2026-80453 Aliases CVE-2026-115748 GHSA-whj5-44p4-m2ff

Authorization bypass in Apache Vysper XMPP server library

MEDIUM 41CWE-639Published 2026-10-26 · Updated 2026-11-02

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-639.

Summary

Apache Vysper, all versions, is affected by an authorization bypass in its XEP-0077 (In-Band Registration) implementation. The implementation is missing an authentication check (CWE-639). Any authenticated user can compromise other accounts.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

**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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00613 49th percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apache	Apache Vysper	all versions	—	No fix listed	CNA

Apache Vysper VendorApache Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Apache Vysper. Red Hat Fuse 7 is affected and has no fix plan available. The project is retired, and users are recommended to find an alternative.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Fuse 7	Affected	No fix yet: Fix deferred

Timeline

2026-10-26 Threatist record created from CVE-2026-115748
2026-10-27 Affected versions changed · Red Hat
2026-10-27 CVSS score added · Red Hat
2026-10-27 Alias added: GHSA-whj5-44p4-m2ff
2026-10-27 Priority changed: MEDIUM → LOW
2026-11-02 CISA SSVC decision points changed
2026-11-02 Priority changed: LOW → MEDIUM

References

Advisory 1

https://lists.apache.org/thread.html/979n9lzg10vc7tdrrlgy4lh5yrsw8wsj

Other 1

https://mina.apache.org/vysper-project/

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Sources

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