CVE-2026-4325

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The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an attacker to delete arbitrary single-use entries, which can enable the replay of consumed action tokens, such as password reset links. This could lead to unauthorized access or account compromise."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo en Keycloak. El SingleUseObjectProvider, un almac\u00e9n global de clave-valor, carece de aislamiento adecuado de tipo y espacio de nombres. Esta vulnerabilidad permite a un atacante eliminar entradas arbitrarias de un solo uso, lo que puede permitir la repetici\u00f3n de tokens de acci\u00f3n consumidos, como enlaces de restablecimiento de contrase\u00f1a. Esto podr\u00eda conducir a acceso no autorizado o compromiso de cuenta."}], "id": "CVE-2026-4325", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-4325", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T13:17:04.550488Z", "version": "2.0.3"}}]}, "published": "2026-04-02T13:16:26.863", "references": [{"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:6475"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:6476"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:6477"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:6478"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-4325"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448351"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-653"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Ng\u1ecdc Chung Kim for reporting this issue.", "affected_release": [{"advisory": "RHSA-2026:6476", "cpe": "cpe:/a:redhat:build_keycloak:26.2::el9", "package": "rhbk/keycloak-operator-bundle:26.2.15-1", "product_name": "Red Hat build of Keycloak 26.2", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6476", "cpe": "cpe:/a:redhat:build_keycloak:26.2::el9", "package": "rhbk/keycloak-rhel9:26.2-18", "product_name": "Red Hat build of Keycloak 26.2", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6476", "cpe": "cpe:/a:redhat:build_keycloak:26.2::el9", "package": "rhbk/keycloak-rhel9-operator:26.2-18", "product_name": "Red Hat build of Keycloak 26.2", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6475", "cpe": "cpe:/a:redhat:build_keycloak:26.2::el9", "package": "rhbk/keycloak-rhel9", "product_name": "Red Hat build of Keycloak 26.2.15", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6478", "cpe": "cpe:/a:redhat:build_keycloak:26.4::el9", "package": "rhbk/keycloak-operator-bundle:26.4.11-1", "product_name": "Red Hat build of Keycloak 26.4", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6478", "cpe": "cpe:/a:redhat:build_keycloak:26.4::el9", "package": "rhbk/keycloak-rhel9:26.4-14", "product_name": "Red Hat build of Keycloak 26.4", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6478", "cpe": "cpe:/a:redhat:build_keycloak:26.4::el9", "package": "rhbk/keycloak-rhel9-operator:26.4-14", "product_name": "Red Hat build of Keycloak 26.4", "release_date": "2026-04-02T00:00:00Z"}, {"advisory": "RHSA-2026:6477", "cpe": "cpe:/a:redhat:build_keycloak:26.4::el9", "package": "rhbk/keycloak-rhel9", "product_name": "Red Hat build of Keycloak 26.4.11", "release_date": "2026-04-02T00:00:00Z"}], "bugzilla": {"description": "keycloak: Keycloak: Replay of action tokens via improper handling of single-use entries", "id": "2448351", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448351"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-653", "details": ["A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an attacker to delete arbitrary single-use entries, which can enable the replay of consumed action tokens, such as password reset links. This could lead to unauthorized access or account compromise."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-4325", "public_date": "2026-04-02T12:30:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-4325\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4325"], "statement": "This flaw in Keycloak's SingleUseObjectProvider has a MODERATE impact. It allows an attacker to delete arbitrary single-use entries, which could lead to the replay of consumed action tokens such as password reset links. Exploitation requires high attack complexity and user interaction.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4-14)"}}], "enrichment": {"confidence": 89.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 89.0, "source": "matching"}]}, "original": {"product": "Red Hat build of Keycloak 26.4", "source": "cna", "vendor": "Red Hat"}, "product": "build_of_keycloak", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4.11-1)"}}], "enrichment": {"confidence": 89.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 89.0, "source": "matching"}]}, "original": {"product": "Red Hat build of Keycloak 26.4", "source": "cna", "vendor": "Red Hat"}, "product": "build_of_keycloak", "vendor": "redhat"}], "analysis": {"en": {"generated_at": "2026-04-02T22:59:50.617391+00:00", "value": {"mitigation_remediation": ["Apply the Red\u00a0Hat security updates RHSA-2026:6475 through RHSA-2026:6478 to upgrade Keycloak to a patched version.", "If an update cannot be applied immediately, limit network exposure to the Keycloak instance and enforce strict access controls to the underlying datastore.", "Monitor authentication logs for repeated use of the same action token and investigate any unauthorized password reset attempts."], "summary": {"action": "Patch Now", "impact": "Replay of consumed action tokens leading to unauthorized account access"}, "threat_synthesis": {"affected_systems": "Affects the Red\u00a0Hat build of Keycloak versions 26.2, 26.2.15, 26.4, and 26.4.11 running on RHEL\u00a09. The severity is moderate with a CVSS score of 5.3, and the vulnerability is not listed in the CISA KEV catalog. No publicly available exploit tools or code have been reported, and the EPSS score is not provided.", "description_and_impact": "The vulnerability is caused by the SingleUseObjectProvider in Keycloak lacking proper type and namespace isolation. An attacker able to delete arbitrary single\u2011use entries in the global key\u2011value store can replay consumed action tokens, such as password reset links, thereby bypassing the intended single\u2011use restriction. This flaw, an example of Improper restriction of capabilities (CWE\u2011653), can grant unauthorized access or compromise user accounts.", "risk_and_exploitability": "Exploitation requires the attacker to access the mechanism that deletes single-use entries, which may occur through privileged API calls or compromise of the underlying datastore. Because the flaw involves deletion rather than direct code execution, the attack vector is likely via internal or compromised accounts rather than remote unauthenticated access. The lack of a dedicated workaround indicates the most effective mitigation is to apply the released Red\u00a0Hat security updates. Until a patch is in place, the risk remains moderate; monitoring for replayed tokens and restricting network access to Keycloak can reduce the likelihood of exploitation."}}}}, "created": "2026-04-02T20:12:42.562681+00:00", "updated": "2026-04-03T09:18:48.762029+00:00", "vendors": ["redhat", "redhat$PRODUCT$build_of_keycloak"]}