CVE-2026-18963— Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
Quick assessment
Affected
Red Hat Red Hat build of Keycloak 26.4
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Keycloak是Keycloak组织开源的一款身份认证与权限管理平台。 Keycloak存在授权问题漏洞，该漏洞源于keycloak-services组件的凭据重置流程存在缺陷，可能导致未经身份验证的攻击者无需点击所需的电子邮件验证链接即可强制任何用户的密码重置过程，通过直接设置新凭据完全控制目标用户账户。
Public Exploits 1
Nuclei · 1
CVE-2026-18963.yaml [template]
In-the-Wild Activity Observed
github_trending · high
Affected Version Matrix 13
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.15-1< * |
unaffected |
26.4-23< * |
unaffected | ||
26.4-23< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.4.15 | any |
unaffected |
any |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.6-1< * |
unaffected |
26.6-12< * |
unaffected | ||
26.6-12< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.6.6 | any |
unaffected |
any |
unaffected | ||
any |
unaffected | ||
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | any |
unaffected |
| Red Hat | Red Hat Single Sign-On 7 | any |
unaffected |
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I. Basic Information for CVE-2026-18963
Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
忘记口令恢复机制弱
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak组织开源的一款身份认证与权限管理平台。 Keycloak存在授权问题漏洞，该漏洞源于keycloak-services组件的凭据重置流程存在缺陷，可能导致未经身份验证的攻击者无需点击所需的电子邮件验证链接即可强制任何用户的密码重置过程，通过直接设置新凭据完全控制目标用户账户。
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 26.4 | 26.4.15-1 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-23 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-23 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4.15 | - |
cpe:/a:redhat:build_keycloak:26.4
|
|
| Red Hat | Red Hat build of Keycloak 26.4.15 | - |
cpe:/a:redhat:build_keycloak:26.4
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.6-1 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-12 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-12 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.6 | - |
cpe:/a:redhat:build_keycloak:26.6
|
|
| Red Hat | Red Hat build of Keycloak 26.6.6 | - |
cpe:/a:redhat:build_keycloak:26.6
|
|
| Red Hat | Red Hat build of Keycloak 26.6.6 | - |
cpe:/a:redhat:build_keycloak:26.6
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | - |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Single Sign-On 7 | - |
cpe:/a:redhat:red_hat_single_sign_on:7
|
|
II. Public POCs for CVE-2026-18963
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Keycloak versions prior to 26.7.2, 26.6.6, and 26.4.15 contain a flaw in the reset-credentials flow that allows an unauthenticated attacker to bypass email verification and take over any user account. Two bugs are chained: (1) the tryAnotherWay handler stores a generic "true" selector note not scoped to the execution ID, and (2) ResetCredentialEmail.action() calls context.success() without verifying ACTION_TOKEN_USER_ID. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18963.yaml | POC Details |
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Vendor Advisories for CVE-2026-18963 (6)
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-
-
-
🔗 RHSA-2026:56524 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:56523 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-08-18 · 14 CVEs total
| CVE-2026-12564 | 9.6 CRITICAL | Automation-controller: automation-controller: kubernetes service account token exfiltratio |
| CVE-2026-66793 | 8.8 HIGH | Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary containe |
| CVE-2026-75924 | 8.7 HIGH | Managed-serviceaccount: managed-serviceaccount: hub addon-manager clusterrole grants clust |
| CVE-2026-71365 | 7.7 HIGH | Awx: webhook status callback ssrf leaks the git pat |
| CVE-2026-15571 | 7.3 HIGH | Keycloak-services: keycloak-services: predictable account-linking hash enables account tak |
| CVE-2026-66780 | 6.5 MEDIUM | Submariner-operator: broker serviceaccount secret (token + ca) logged in full at trace ver |
| CVE-2026-75032 | 6.3 MEDIUM | Bluez: bluez: out-of-bounds read in avrcp parse_media_element and parse_media_folder |
| CVE-2026-66782 | 5.8 MEDIUM | Submariner-operator: operator clusterrole grants cluster-wide create/update on all configm |
| CVE-2026-75485 | 5.5 MEDIUM | Must-gather: /tmp/kubeconfig retention |
| CVE-2026-73834 | 5.5 MEDIUM | Must-gather: must-gather: embedded secret data in acm wrapper crs collected without redact |
| CVE-2026-66781 | 5.4 MEDIUM | Submariner-operator: pprof debug endpoint enabled by default on 0.0.0.0:8082 without authe |
| CVE-2026-19608 | 5.3 MEDIUM | Keycloak-services: keycloak-services: name-only group claims let same-name groups satisfy |
| CVE-2026-66783 | 4.4 MEDIUM | Submariner-operator: release workflow consumes same-org composite action via mutable @deve |
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Same product: Red Hat build of Keycloak 26.4
-
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-
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V. Comments for CVE-2026-18963
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