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Exploitation reportedNot in CISA KEV yetFix availableAwaiting NVD analysis

CVE-2026-18963

Exploitation reported by one source. First attested on 2026-08-25 by GCVE · previdian.

  • Published2026-08-18
  • Fixed in26.7.2 · 26.6.6 · 26.4.15
  • WeaknessCWE-640

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-08-1817:16CVE publishedNVD
  2. 2026-08-2515:13Listed as exploited by GCVEGCVE
  3. 2026-08-2515:13Exploitation first reportedGCVE
  4. 2026-10-21Exploit-DB entryExploit-DB

Versions per branch

OSV
keycloak-services
BranchAffectedFixed in
26.7≥ 26.7.0, < 26.7.226.7.2
26.x≥ 26.5.0, < 26.6.626.6.6
26.x≥ 26.0.0, < 26.4.1526.4.15
keycloak
BranchAffectedFixed in
26.7< 26.7.226.7.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA13 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

7 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-23

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • keycloakMinimOSall versions · fixed in 26.7.2-r0and 3 other packages
  • keycloak-26.5Wolfiall versions · fixed in 26.5.7-r6and 1 other package
  • keycloak-26.5Chainguardall versions · fixed in 26.5.7-r6and 1 other package
  • keycloak-fips-26.5Chainguardall versions · fixed in 26.5.7-r12and 1 other package
  • request-9047-keycloak-fips-26.4Chainguardall versions · no fixed version listedand 1 other package
  • request-9047-keycloak-fips-26.5Chainguardall versions · fixed in 26.5.7-r26and 1 other package

Vendor advisories

  • CVE-2026-18963 Red Hat Product Security20 products fixed · 1 known affected

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

    keycloak-services as a component of Red Hat Single Sign-On 7

  • ICSA-26-265-06 CISA4 known affected

    Siemens Industrial Edge Management

    Industrial Edge Management Cloud · Industrial Edge Management Pro V1 >= V1.14.9 < V1.15.20 · Industrial Edge Management Pro V2 >= V2.2.0 < V2.2.2 · +1 more

  • SSA-503852 Siemens ProductCERT4 known affected

    SSA-503852: Authentication Bypass Vulnerability in Industrial Edge Management

    Industrial Edge Management Cloud · Industrial Edge Management Pro V1 >= V1.14.9 < V1.15.20 · Industrial Edge Management Pro V2 >= V2.2.0 < V2.2.2 · +1 more

  • RHSA-2026:56519 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: Red Hat build of Keycloak 26.4.15 Images Security Update

  • RHSA-2026:56524 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Images Security Update

  • RHSA-2026:56523 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Security Update

1 more advisory

Full record on NVD

Fix

  1. Update keycloak-services to 26.7.2 · 26.6.6 · 26.4.15
  2. Vendor fix CISA ICSA-26-265-06 · 1 productUpdate to V1.15.20 or later version
  3. Vendor fix CISA ICSA-26-265-06 · 1 productUpdate to V2.2.2 or later version
  4. Vendor fix CISA ICSA-26-265-06 · 1 productUpdate to V2.9.1 or later version
  5. Vendor fix CISA ICSA-26-265-06 · 1 productVulnerability mitigated with firewall rules on 2026-08-26 and fixed with update on 2026-09-02; no user actions necessary
  6. Vendor fix Siemens ProductCERT SSA-503852 · 1 productUpdate to V1.15.20 or later version
  7. Vendor fix Siemens ProductCERT SSA-503852 · 1 productUpdate to V2.2.2 or later version

Detection

read 2026-11-03 22:43 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-52699
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2026-08-18
Last Modified
2026-10-23
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-4gv3-mc9p-5wqc

Frequently asked questions

What is CVE-2026-18963?

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.

Is CVE-2026-18963 actively exploited?

Active exploitation of CVE-2026-18963 has not been confirmed. Its EPSS score was 6.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-18963?

CVE-2026-18963 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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