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CVE Vulnerability Details :
CVE-2026-1518
PUBLISHED
More InfoOfficial Page
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
View Known Exploited Vulnerability (KEV) details
Published At-02 Feb, 2026 | 07:17
Updated At-02 Feb, 2026 | 14:07
Rejected At-
▼CVE Numbering Authority (CNA)
Keycloak: blind server-side request forgery (ssrf) via ciba backchannel notification endpoint in keycloak

A flaw was found in Keycloak’s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services.

Affected Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Build of Keycloak
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-operator-bundle
CPEs
  • cpe:/a:redhat:build_keycloak:
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Build of Keycloak
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Build of Keycloak
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-rhel9-operator
CPEs
  • cpe:/a:redhat:build_keycloak:
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-918Server-Side Request Forgery (SSRF)
Type: CWE
CWE ID: CWE-918
Description: Server-Side Request Forgery (SSRF)
Metrics
VersionBase scoreBase severityVector
3.12.7LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Version: 3.1
Base score: 2.7
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Metrics Other Info
Red Hat severity rating
value:
Low
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds

To mitigate this issue, restrict administrative access to Keycloak instances. Ensure that only trusted and authorized personnel have the necessary privileges to configure client settings, including the backchannel_client_notification_endpoint. This limits the ability of an attacker to manipulate the endpoint for SSRF attacks.

Exploits
Credits
Red Hat would like to thank Patrick Smith for reporting this issue.
Timeline
EventDate
Reported to Red Hat.2026-01-28 08:06:13
Made public.2026-01-28 00:00:00
Event: Reported to Red Hat.
Date: 2026-01-28 08:06:13
Event: Made public.
Date: 2026-01-28 00:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://access.redhat.com/security/cve/CVE-2026-1518
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2433727
issue-tracking
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-1518
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2433727
Resource:
issue-tracking
x_refsource_REDHAT
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found