CVE-2023-6484Public exploitNetwork attack vector

Audit-log forgery via unsanitized WebAuthn errors

Published Apr 25, 2024 · Updated Jun 26, 2026

Log injection in Keycloak before 22.0.9 and 23.0.0 through 23.0.4 allows remote attackers to forge log entries via WebAuthn errors. WebAuthn authentication and registration forms return browser-generated error text to the server, whose JBoss logging provider writes it without neutralizing line breaks or quotes. A reachable WebAuthn setup or authentication flow is required, and crafted error parameters corrupt audit-log integrity without reported confidentiality or availability impact.

CVSS severity5.3
Medium
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Log injection in Keycloak before 22.0.9 and 23.0.0 through 23.0.4 allows remote attackers to forge log entries via WebAuthn errors. WebAuthn authentication and registration forms return browser-generated error text to the server, whose JBoss logging provider writes it without neutralizing line breaks or quotes. A reachable WebAuthn setup or authentication flow is required, and crafted error parameters corrupt audit-log integrity without reported confidentiality or availability impact.

The record

CVE
CVE-2023-6484
Published
Apr 25, 2024
Updated
Jun 26, 2026
Vendor
Red Hat
Product
RHEL-8 based Middleware Containers
Classifications
CWE-117
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · RHEL-8 based Middleware ContainersAffected versions are unavailable in this record.
389 Directory Server · Red Hat Single Sign-OnAffected versions are unavailable in this record.
Red Hat · Red Hat build of Keycloak 22Affected versions are unavailable in this record.
Keycloak · Keycloakversion=0 <22.0.9; version=23.0.0 <23.0.5

Published CVSS scores

5.3Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-117Improper Output Neutralization for Logs

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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