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CVE-2026-15572 (GCVE-0-2026-15572)

Vulnerability from cvelistv5 – Published: 2026-08-05 15:09 – Updated: 2026-08-05 18:42
VLAI
Title
Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
Summary
A flaw was found in Keycloak's Dynamic Client Registration (DCR) security policy management. The "Allowed Protocol Mapper Types" policy, which restricts which types of data mappers a client can use, fails to re-validate the mapper type during a client update if the mapper's configuration remains unchanged. An attacker with client registration privileges can exploit this by first registering an allowed mapper type with a malicious configuration and then swapping it for a restricted, high-privilege mapper type (such as one that hardcodes administrative roles). This allows the attacker to gain full administrative access to the Keycloak realm.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 18:11 UTC
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:50846 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50847 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50848 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50849 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-15572 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2499592 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.14-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-22 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.14     cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.5-1 , < * (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: 26.6-11 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.5     cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Date Public
2026-08-05 02:02
Show details on NVD website

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\"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhbk/keycloak-rhel9-operator\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:build_keycloak:26.6::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat build of Keycloak 26.6.5\", \"packageName\": \"rhbk/keycloak-rhel9\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-07-06T23:27:45.000Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-08-05T02:02:00.000Z\", \"value\": \"Made public.\"}], \"datePublic\": \"2026-08-05T02:02:00.000Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2026:50846\", \"name\": \"RHSA-2026:50846\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:50847\", \"name\": \"RHSA-2026:50847\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:50848\", \"name\": \"RHSA-2026:50848\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:50849\", \"name\": \"RHSA-2026:50849\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2026-15572\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2499592\", \"name\": \"RHBZ#2499592\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in Keycloak\u0027s Dynamic Client Registration (DCR) security policy management. The \\\"Allowed Protocol Mapper Types\\\" policy, which restricts which types of data mappers a client can use, fails to re-validate the mapper type during a client update if the mapper\u0027s configuration remains unchanged. An attacker with client registration privileges can exploit this by first registering an allowed mapper type with a malicious configuration and then swapping it for a restricted, high-privilege mapper type (such as one that hardcodes administrative roles). This allows the attacker to gain full administrative access to the Keycloak realm.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-843\", \"description\": \"Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-08-05T18:11:41.062Z\"}, \"x_redhatCweChain\": \"CWE-843: Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-15572\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T18:42:39.517Z\", \"dateReserved\": \"2026-07-13T07:36:49.779Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-08-05T15:09:23.102Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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