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CVE-2026-18963 (GCVE-0-2026-18963)

Vulnerability from cvelistv5 – Published: 2026-08-18 17:05 – Updated: 2026-09-08 08:44
VLAI Previdian
Title
Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
Summary
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.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 13:53 UTC
CWE
  • CWE-640 - Weak Password Recovery Mechanism for Forgotten Password
References
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.15-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
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Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-23 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.15     cpe:/a:redhat:build_keycloak:26.4
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.6-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-12 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.6     cpe:/a:redhat:build_keycloak:26.6
Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
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Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
Create a notification for this product.
Siemens Industrial Edge Management Cloud Affected: 0 , < * (custom)
guessed Create a notification for this product.
Siemens Industrial Edge Management Pro V1 Affected: V1.14.9 , < V1.15.20 (custom)
guessed Create a notification for this product.
Siemens Industrial Edge Management Pro V2 Affected: V2.2.0 , < V2.2.2 (custom)
guessed Create a notification for this product.
Siemens Industrial Edge Management Virtual Affected: V2.6.0 , < V2.9.1 (custom)
guessed Create a notification for this product.
Date Public
2026-08-17 00:00
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2026-18963

Status: Confirmed

Status Updated: 2026-08-25 15:13 UTC

Exploited: Yes


Timestamps
First Seen: 2026-08-25
Asserted: 2026-08-25

Scope
Notes: Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass | Affected: Red Hat / Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.15, Red Hat build of Keycloak 26.6, Red Hat build of Keycloak 26.6.6, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Single Sign-On 7 | CVSS: 9.1 (CRITICAL) | EPSS: 0.02788 | Used in malware: unknown | Not yet in CISA KEV: True

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian


Details
Feed Previdian (previdian.com)
Title Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
Vendor Red Hat
Product Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.15, Red Hat build of Keycloak 26.6, Red Hat build of Keycloak 26.6.6, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Single Sign-On 7
Added Date 2026-08-25T15:13:17.550Z
Cvss Score 9.1
Epss Score 0.02788
Cvss Severity CRITICAL
Epss Percentile 0.85319
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True

References

Created: 2026-08-26 16:00 UTC | Updated: 2026-08-26 16:00 UTC
Show details on NVD website

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      "product_status:fixed": "20",
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      "source": "Red Hat CSAF VEX",
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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