{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47842", "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "state": "PUBLISHED", "assignerShortName": "vmware", "dateReserved": "2026-05-20T10:00:51.004Z", "datePublished": "2026-08-26T19:22:23.745Z", "dateUpdated": "2026-08-26T19:45:25.424Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-08-26T19:22:23.745Z"}, "title": "Deterministic AES/CBC Encryption in Spring Security AesBytesEncryptor Allows Ciphertext Correlation", "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-329 Generation of Predictable IV with CBC Mode", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Applications using AesBytesEncryptor with the two-argument constructor or when passing a null IV generator and CBC as the encryption mode encrypt data with AES/CBC using a null (all-zero) initialization vector."}]}], "affected": [{"vendor": "Spring", "product": "Spring Security", "versions": [{"status": "affected", "version": "7.1.0", "versionType": "custom"}, {"status": "affected", "version": "7.0.0", "lessThanOrEqual": "7.0.6", "versionType": "custom"}, {"status": "affected", "version": "6.5.0", "lessThanOrEqual": "6.5.11", "versionType": "custom"}, {"status": "affected", "version": "6.4.0", "lessThanOrEqual": "6.4.18", "versionType": "custom"}, {"status": "affected", "version": "5.8.0", "lessThanOrEqual": "5.8.27", "versionType": "custom"}, {"status": "affected", "version": "5.7.0", "lessThanOrEqual": "5.7.25", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Applications using AesBytesEncryptor with the two-argument constructor or when passing a null IV generator and CBC as the encryption mode encrypt data with AES/CBC using a null (all-zero) initialization vector.\nSpring Security 7.1.0\nSpring Security 7.0.0 - 7.0.6\nSpring Security 6.5.0 - 6.5.11\nSpring Security 6.4.0 - 6.4.18\nSpring Security 5.8.0 - 5.8.27\nSpring Security 5.7.0 - 5.7.25", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Applications using AesBytesEncryptor with the two-argument constructor or when passing a null IV generator and CBC as the encryption mode encrypt data with AES/CBC using a null (all-zero) initialization vector.</p><p>Spring Security 7.1.0<br/>Spring Security 7.0.0 - 7.0.6<br/>Spring Security 6.5.0 - 6.5.11<br/>Spring Security 6.4.0 - 6.4.18<br/>Spring Security 5.8.0 - 5.8.27<br/>Spring Security 5.7.0 - 5.7.25</p>"}]}], "references": [{"url": "https://spring.io/security/cve-2026-47842"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}}], "source": {"discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-26T19:31:49.138588Z", "id": "CVE-2026-47842", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-26T19:45:25.424Z"}}]}}

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{"bugzilla": {"description": "org.springframework.security/spring-security-core: Spring Security: Information disclosure via deterministic AES/CBC encryption", "id": "2524636", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524636"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-1204", "details": ["A flaw was found in Spring Security. Applications configured to use AesBytesEncryptor with a two-argument constructor or a null Initialization Vector (IV) generator in Cipher Block Chaining (CBC) mode will encrypt data using a predictable, all-zero IV. This deterministic encryption allows an attacker to analyze encrypted data and potentially deduce patterns, leading to the disclosure of sensitive information."], "mitigation": {"lang": "en:us", "value": "Upgrade to a fixed version of Spring Security (7.1.1, 7.0.7, 6.5.12, 6.4.19, 5.8.28, or 5.7.26). Alternatively, migrate from the deprecated AesBytesEncryptor to the new AesCbcBytesEncryptor or AesGcmBytesEncryptor classes which use secure random IV generation. If using Encryptors.standard(), Encryptors.stronger(), Encryptors.text(), or Encryptors.delux(), these are also deprecated and should be replaced. Review the Spring Security migration guide to determine whether data re-encryption is required."}, "name": "CVE-2026-47842", "package_state": [{"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Out of support scope", "package_name": "jenkins", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Out of support scope", "package_name": "ocp-tools-4/jenkins-rhel8", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Out of support scope", "package_name": "ocp-tools-4/jenkins-rhel9", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "spring-security-core", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Fix deferred", "package_name": "devspaces/openvsx-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Fix deferred", "package_name": "devspaces/pluginregistry-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Out of support scope", "package_name": "spring-security-core", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-08-26T19:22:23Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-47842\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-47842\nhttps://spring.io/security/cve-2026-47842"], "statement": "A flaw was found in Spring Security. Applications using AesBytesEncryptor with the two-argument constructor or when passing a null IV generator and CBC as the encryption mode encrypt data with AES/CBC using a fixed all-zero initialization vector. Because the IV is deterministic, identical plaintexts always produce identical ciphertext for a given password and salt. An attacker with read access to the encrypted data store can exploit this to determine when two records share the same plaintext value, correlate encrypted values across rows or users, and mount dictionary attacks by pre-encrypting candidate values and comparing results. This is a continuation of CVE-2020-5408.", "threat_severity": "Moderate"}

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