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  4. CVE 2026 104733 user impersonationauthorization bypass in xmpp
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Back to active CVEs
High · CVSS 7.4CVE-2026-104733

User Impersonation/Authorization Bypass in XMPP Server ejabberd

Answer in brief

CVE-2026-104733 records a High severity (CVSS 7.4) vulnerability in User Impersonation/Authorization Bypass in XMPP Server ejabberd. The current sources do not mark it as known exploited. The current feed maps ProcessOne/ejabberd (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ProcessOne/ejabberd (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ProcessOne/ejabberdgeneric>=0 <=26.04Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ProcessOne/ejabberd.
  2. 2Review the reported fix. Source-reported solution: Update to the latest version of ejabberd (26.07)

Evidence timeline and material changes

  1. Published upstream

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencensideattacklogic.de
Upstream source description

User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 2, 2026
References
2 linked sources
Open source record