Keycloak on Red Hat Query Parameter comparison using wrong factors

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k1.85-

Summaryinfo

A vulnerability, which was classified as critical, was found in Keycloak on Red Hat. Affected by this vulnerability is an unknown functionality of the component Query Parameter Handler. The manipulation results in comparison using wrong factors. This vulnerability is identified as CVE-2026-9800. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Keycloak on Red Hat (affected version not known). It has been classified as critical. Affected is some unknown functionality of the component Query Parameter Handler. The manipulation with an unknown input leads to a comparison using wrong factors vulnerability. CWE is classifying the issue as CWE-1025. The code performs a comparison between two entities, but the comparison examines the wrong factors or characteristics of the entities, which can lead to incorrect results and resultant weaknesses. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.

The advisory is shared for download at access.redhat.com. This vulnerability is traded as CVE-2026-9800 since 05/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/25/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (redhat): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Comparison using wrong factors
CWE: CWE-1025
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/28/2026 CVE reserved
06/25/2026 +28 days Advisory disclosed
06/25/2026 +0 days VulDB entry created
06/25/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: access.redhat.com
Status: Not defined

CVE: CVE-2026-9800 (🔒)
GCVE (CVE): GCVE-0-2026-9800
GCVE (VulDB): GCVE-100-373956

Entryinfo

Created: 06/25/2026 19:29
Changes: 06/25/2026 19:29 (60)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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