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Fencer Vulns
critical 9.1

CVE-2026-18963 json

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

published 2026-08-18 2 mo ago modified 2026-10-23 17 d ago also BIT-keycloak-2026-18963 , EUVD-2026-61063 , GHSA-4gv3-mc9p-5wqc

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.6%
EPSS 6.6% chance of exploitation in 30 days, percentile 93%
public exploits
1
Exploit-DB, plus a Nuclei check

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.

Patch / fix

  • maven org.keycloak:keycloak-services 26.4.15, 26.6.6, 26.7.2
  • bitnami keycloak 26.7.2
  • Red Hat Red Hat build of Keycloak 26.4 26.4-23, 26.4.15-1
  • Red Hat Red Hat build of Keycloak 26.6 26.6-12, 26.6.6-1
  • Siemens Industrial Edge Management Pro V1 V1.15.20
  • Siemens Industrial Edge Management Pro V2 V2.2.2
  • Siemens Industrial Edge Management Virtual V2.9.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-18963 updated cvss 9.1

keycloak-services: keycloak-services: Unauthenticated account takeover via reset-credentials flow bypass

  • Red Hat Single Sign-On 7 keycloak-services 23.0.7
    affected: workaround, no fix available
  • Red Hat build of Keycloak 26.4 rhbk/keycloak-rhel9 26.4-23, rhbk/keycloak-rhel9-operator 26.4-23, rhbk/keycloak-operator-bundle 26.4.15-1
    fixed: vendor fix RHSA-2026:56519
  • Red Hat build of Keycloak 26.4.15
    fixed: vendor fix RHSA-2026:56520
  • Red Hat build of Keycloak 26.6 rhbk/keycloak-rhel9 26.6-12, rhbk/keycloak-rhel9-operator 26.6-12, rhbk/keycloak-operator-bundle 26.6.6-1
    fixed: vendor fix RHSA-2026:56524
  • Red Hat build of Keycloak 26.6.6
    fixed: vendor fix RHSA-2026:56523
  • Red Hat JBoss Enterprise Application Platform Expansion Pack keycloak-services 23.0.7
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-265-06 updated cvss 9.1

Siemens Industrial Edge Management

  • Siemens Industrial Edge Management Cloud
    affected: vendor fix, mitigation
  • Siemens Industrial Edge Management Pro V1 >= 1.14.9, < 1.15.20
    affected: fixed in V1.15.20, mitigation iehub.eu1.edge.siemens.cloud
  • Siemens Industrial Edge Management Pro V2 >= 2.2.0, < 2.2.2
    affected: fixed in V2.2.2, mitigation iehub.eu1.edge.siemens.cloud
  • Siemens Industrial Edge Management Virtual >= 2.6.0, < 2.9.1
    affected: fixed in V2.9.1, mitigation iehub.eu1.edge.siemens.cloud

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Timeline

  1. Published
  2. First public exploit (EDB-52699)

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 mo ago

Exploit prediction

6.59% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52699 Keycloak 26.7.2 - Unauthenticated Account Takeover webapps, 2026-10-21
  • Nuclei template Keycloak < 26.7.2 - Unauthenticated Account Takeover via Reset-Credentials Bypass nuclei detection template

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
OSV 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-services
>=26.0.0, <26.4.15
>=26.5.0, <26.6.6
>=26.7.0, <26.7.2
26.4.15
26.6.6
26.7.2
bitnami keycloak
<26.7.2
26.7.2

Affected products

  • Red Hat Red Hat build of Keycloak 26.4
  • Red Hat Red Hat build of Keycloak 26.4.15
  • Red Hat Red Hat build of Keycloak 26.6
  • Red Hat Red Hat build of Keycloak 26.6.6
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat Single Sign-On 7
  • Siemens Industrial Edge Management Cloud
  • Siemens Industrial Edge Management Pro V1
  • Siemens Industrial Edge Management Pro V2
  • Siemens Industrial Edge Management Virtual

Classification

Weakness
  • CWE-640 Weak Password Recovery Mechanism for Forgotten Password

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.