CVE-2026-1518— Keycloak: blind server-side request forgery (ssrf) via ciba backchannel notification endpoint in keycloak
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I. Basic Information for CVE-2026-1518
Vulnerability Information
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Vulnerability Title
Keycloak: blind server-side request forgery (ssrf) via ciba backchannel notification endpoint in keycloak
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Keycloak 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在代码问题漏洞，该漏洞源于CIBA功能对客户端配置的后端通知端点验证不足，可能导致对内部服务的盲服务器端请求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Build of Keycloak | - | cpe:/a:redhat:build_keycloak: | |
| Red Hat | Red Hat Build of Keycloak | - | cpe:/a:redhat:build_keycloak: | |
| Red Hat | Red Hat Build of Keycloak | - | cpe:/a:redhat:build_keycloak: |
II. Public POCs for CVE-2026-1518
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Red Hat · 2026-02-02 · 7 CVEs total
| CVE-2026-1761 | 8.6 HIGH | Libsoup: stack-based buffer overflow in libsoup multipart response parsingmultipart http r |
| CVE-2026-1531 | 8.1 HIGH | Foreman-kubevirt: foreman_kubevirt: man-in-the-middle due to insecure default ssl verifica |
| CVE-2026-1530 | 8.1 HIGH | Fog-kubevirt: fog-kubevirt: man-in-the-middle vulnerability due to disabled certificate va |
| CVE-2026-1757 | 6.2 MEDIUM | Libxml2: memory leak leading to local denial of service in xmllint interactive shell |
| CVE-2026-1760 | 5.3 MEDIUM | Libsoup: soupserver: denial of service via http request smuggling |
| CVE-2025-13881 | 2.7 LOW | Org.keycloak.services.resources.admin: keycloak: limited administrator can retrieve sensit |
IV. Related Vulnerabilities
Same product: Red Hat Build of Keycloak
- CVE-2026-7500
Org.keycloak.keycloak-services: improper access control on k - CVE-2026-37980
Org.keycloak.forms.login: keycloak: keycloak: arbitrary code - CVE-2026-37977
Keycloak: org.keycloak.protocol.oidc.grants.ciba: keycloak: - CVE-2026-4874
Org.keycloak.protocol.oidc.grants: org.keycloak.services.man - CVE-2026-4633
Keycloak: keycloak: user enumeration via differential error
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-918
- CVE-2026-8193
Akaunting Invoice PDF Rendering dompdf.php server-side reque - CVE-2026-44313
LinkWarden: Server-Side Request Forgery (SSRF) in Link Creat - CVE-2026-42352
pygeoapi 0.23.x: Unauthenticated SSRF via OGC API - Processe - CVE-2026-42346
Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validatio - CVE-2026-42339
New API: SSRF Filter Bypass via 0.0.0.0
V. Comments for CVE-2026-1518
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