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CVE-2026-18963

Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass

9.1 CriticalPublic exploitFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

4.68%Up 4.3 points since Aug 19, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.1

Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass

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.

Record
CVE-2026-18963
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-640
Updated
2026-11-02
EUVDEUVD-2026-61063 9.1

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.

Record
EUVD-2026-61063
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-4gv3-mc9p-5wqc 9.1

Keycloak: Unauthenticated account takeover via reset-credentials flow bypass

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.

Record
GHSA-4gv3-mc9p-5wqc
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-640
Updated
2026-11-02
NVD 9.1

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.

Record
CVE-2026-18963
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-640
Updated
2026-11-02
OSVGHSA-4gv3-mc9p-5wqc 9.1

Keycloak: Unauthenticated account takeover via reset-credentials flow bypass

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.

Record
GHSA-4gv3-mc9p-5wqc
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-640
Updated
2026-11-02
OSVBIT-keycloak-2026-18963 No score

Flaw in the reset-credentials flow of the keycloak-services component

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.

Record
BIT-keycloak-2026-18963
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.keycloak:keycloak-services
Maven
26.0.0 up to 26.4.15
26.4.15
org.keycloak:keycloak-services
Maven
26.5.0 up to 26.6.6
26.6.6
org.keycloak:keycloak-services
Maven
26.7.0 up to 26.7.2
26.7.2
keycloak
Bitnami
before 26.7.2
26.7.2
org.keycloak:keycloak-services
Maven
26.0.0 up to 26.4.15, plus listed versions
26.0.126.0.226.0.326.0.426.0.5
Show 29 moreShow less
26.0.626.0.726.0.826.1.026.1.126.1.226.1.326.1.426.1.526.2.026.2.126.2.226.2.326.2.426.2.526.3.026.3.126.3.226.3.326.3.426.3.526.4.026.4.126.4.226.4.326.4.426.4.526.4.626.4.7
26.4.15
org.keycloak:keycloak-services
Maven
26.5.0 up to 26.6.6, plus listed versions
26.5.126.5.226.5.326.5.426.5.5
Show 7 moreShow less
26.5.626.5.726.6.026.6.126.6.226.6.326.6.4
26.6.6
org.keycloak:keycloak-services
Maven
26.7.0 up to 26.7.2, plus listed versions
26.7.1
26.7.2

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubSnizi/CVE-2026-18963-Exploit2026-08-20
PoC in GitHubkyos-public/keycloak-cve-2026-18963-hunt2026-08-20
PoC in GitHubRed-Darkin/CVE-2026-18963-keycloak2026-08-24
PoC in GitHubT0w0T/POC-CVE-2026-189632026-08-24
PoC in GitHubminh3102011/CVE-2026-18963_analyst2026-08-24
PoC in GitHubBlackHatExploitation/Exploit-For-CVE-2026-189632026-08-25
PoC in GitHubdebugactiveprocess/CVE-2026-189632026-08-25
PoC in GitHubgman0x00/keycloak-CVE-2026-189632026-08-25
PoC in GitHubprot0tw/Keycloak_CVE-2026-18963_PoC2026-08-25
PoC in GitHubalt3kx/CVE-2026-189632026-08-27
Show 9 moreShow less
Public exploits
SourceLinkDate
PoC in GitHubEQSTLab/CVE-2026-189632026-09-01
PoC in GitHub0xlyvio/CVE-2026-18963-keycloak2026-09-05
PoC in GitHubynsmroztas/KeySniper2026-09-06
PoC in GitHubivanesk315/CVE-2026-189632026-09-10
PoC in GitHubSonOfABot/-CVE-2026-18963-POC2026-10-08
PoC in GitHubhardeep-sudo/Keycloak-CVE-2026-18963-Exploit2026-10-08
PoC in GitHuborevim/CVE-2026-18963-PoC2026-10-15
Exploit-DBKeycloak 26.7.2 - Unauthenticated Account Takeover2026-10-21
NucleiKeycloak < 26.7.2 - Unauthenticated Account Takeover via Reset-Credentials Bypass

History

History
RecordedChangedSources
exploits, factsPoC in GitHub
first indexedCVE List, EUVD, Exploit-DB, GitHub Advisories, Nuclei, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-18963 is a critical vulnerability (CVSS 9.1) in Red Hat Build Of Keycloak 26.4, published August 18, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.68%, the 91st percentile. Fixed in org.keycloak:keycloak-services 26.4.15.

References

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