VulnerabilityPublished 30 Oct 2026

CVE-2026-118947: Red Hat Build of Keycloak · Insecure Direct Object Reference

Affects Red Hat Build of KeycloakSource CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium.

Data as of 30 Oct 2026, 00:59 UTC

CVSS 3.1 base score

4.3Medium

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (redhat)	CVSS 3.1	4.3

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hat Build of Keycloakkeycloak-services	Affected–	Fixed in–
Red Hat Build of Keycloakrhbk/keycloak-rhel9	Affected–	Fixed in–
Red Hat Single Sign-On 7keycloak-services	Affected–	Fixed in–

AI-suggested

Red Hat has published an advisory for CVE-2026-118947 but does not currently list fixed versions or patches. Until a fix is available, ensure that remote resource management is configured securely and restrict the uma_protection role to trusted users only. Monitor Red Hat communications for forthcoming patches or mitigations.

Description

CVE-2026-118947 is a vulnerability in the UMA resource registration endpoint of the keycloak-services component in Red Hat Build of Keycloak. When remote resource management is enabled, an authenticated user with the uma_protection role and knowledge of a target resource ID can update resources they do not own. This allows unauthorized modification of resource configurations such as names, URIs, and scopes. Exploitation requires valid credentials and specific permissions. The vulnerability is due to a missing ownership check in the resource registration code path.

Impact

An attacker with valid credentials and the uma_protection role can modify resource configurations they do not own, including resource names, URIs, and scopes. This impacts the integrity of resource configurations but does not affect confidentiality or availability. Exploitation requires knowledge of the target resource ID and appropriate permissions, limiting the attack surface to authorized users with specific roles.

Summary

This vulnerability affects the UMA resource registration endpoint in the keycloak-services component of Red Hat Build of Keycloak. It arises when remote resource management is enabled and allows an authenticated user with the uma_protection role to bypass authorization controls by specifying a target resource ID in a request. The flaw is a missing ownership verification, enabling modification of resource configurations that the user does not own. The issue impacts integrity but not confidentiality or availability. Red Hat rates the severity as moderate with a CVSS 3.1 score of 4.3. No public exploits or active exploitation are known. The vulnerability is documented in Red Hat's advisory and tracked as Bugzilla 2563274.

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What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 00:46 UTC

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