CyberSecBulletin
CVE-2026-18963NVD status: Awaiting Analysis

Red Hat build of Keycloak 26.4: Weak Password Recovery Mechanism for Forgotten Password

Published Updated By the CyberSecBulletin desk

CVE-2026-18963 is a critical-severity weak password recovery mechanism for forgotten password vulnerability in Red Hat build of Keycloak 26.4 from Red Hat, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 8.09% chance of exploitation within 30 days, which is in the top 5.09% of all scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Industrial Edge Management Pro V1 to V1.15.20 or a later version.
  2. Update Industrial Edge Management Pro V2 to V2.2.2 or a later version.
  3. Update Industrial Edge Management Virtual to V2.9.1 or a later version.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Red HatRed Hat build of Keycloak 26.4Not specified in the recordNot stated
Red HatRed Hat build of Keycloak 26.4.15Not specified in the recordNot stated
Red HatRed Hat build of Keycloak 26.6Not specified in the recordNot stated
Red HatRed Hat build of Keycloak 26.6.6Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7.6 for RHEL 7Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7.6 for RHEL 8Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7.6 for RHEL 9Not specified in the recordNot stated
Red HatRHEL-8 based Middleware ContainersNot specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform Expansion PackNot specified in the recordNot stated
SiemensIndustrial Edge Management Cloudall versionsNot stated
SiemensIndustrial Edge Management Pro V1V1.14.9 up to, but not including, V1.15.20V1.15.20
SiemensIndustrial Edge Management Pro V2V2.2.0 up to, but not including, V2.2.2V2.2.2
SiemensIndustrial Edge Management VirtualV2.6.0 up to, but not including, V2.9.1V2.9.1

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (redhat.com).

Official 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: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Weak Password Recovery Mechanism for Forgotten Password

The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak.

How developers prevent this class of flaw

  • Make sure that all input supplied by the user to the password recovery mechanism is thoroughly filtered and validated.
  • Do not use standard weak security questions and use several security questions.
  • Make sure that there is throttling on the number of incorrect answers to a security question. Disable the password recovery functionality after a certain (small) number of incorrect guesses.

More Weak Password Recovery Mechanism for Forgotten Password vulnerabilities (CWE-640)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Red Hat build of Keycloak 26.4

All Red Hat build of Keycloak 26.4 vulnerabilities

Recent Weak Password Recovery Mechanism for Forgotten Password vulnerabilities

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