CVE-2026-23901

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{"affected": [{"affectedData": [{"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "org.apache.shiro:shiro-core", "product": "Apache Shiro", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "2.0.7", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*", "matchCriteriaId": "9E1B2B45-F100-4693-9F70-FE8D342853A3", "versionEndExcluding": "2.0.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Observable Timing Discrepancy vulnerability in Apache Shiro.\n\nThis issue affects Apache Shiro: from 1.*, 2.* before 2.0.7.\n\nUsers are recommended to upgrade to version 2.0.7 or later, which fixes the issue.\n\nPrior to Shiro 2.0.7, code paths for non-existent vs. existing users are different enough,\nthat a brute-force attack may be able to tell, by timing the requests only, determine if\nthe request failed because of a non-existent user vs. wrong password.\n\nThe most likely attack vector is a local attack only.\nShiro security model\u00a0 https://shiro.apache.org/security-model.html#username_enumeration \u00a0discusses this as well.\n\nTypically, brute force attack can be mitigated at the infrastructure level."}, {"lang": "es", "value": "Vulnerabilidad de discrepancia de tiempo observable en Apache Shiro.\n\nEste problema afecta a Apache Shiro: desde 1.*, 2.* antes de 2.0.7.\n\nSe recomienda a los usuarios actualizar a la versi\u00f3n 2.0.7 o posterior, que soluciona el problema.\n\nAntes de Shiro 2.0.7, las rutas de c\u00f3digo para usuarios inexistentes frente a usuarios existentes son lo suficientemente diferentes como para que un ataque de fuerza bruta pueda discernir, solo cronometrando las solicitudes, si la solicitud fall\u00f3 debido a un usuario inexistente frente a una contrase\u00f1a incorrecta.\n\nEl vector de ataque m\u00e1s probable es solo un ataque local.\nEl modelo de seguridad de Shiro https://shiro.apache.org/security-model.html#username_enumeration tambi\u00e9n aborda esto.\n\nT\u00edpicamente, el ataque de fuerza bruta puede mitigarse a nivel de infraestructura."}], "id": "CVE-2026-23901", "lastModified": "2026-06-17T10:22:16.960", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 2.5, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "AUTOMATIC", "Safety": "NEGLIGIBLE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 1.0, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "GREEN", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "CONCENTRATED", "vectorString": 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{"bugzilla": {"description": "org.apache.shiro/shiro-core: Apache Shiro: Brute force attack possible to determine valid user names", "id": "2438436", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2438436"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-208", "details": ["No description is available for this CVE."], "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-2026-23901", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Fix deferred", "package_name": "shiro-core", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Fix deferred", "package_name": "shiro-core", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "package_name": "shiro-core", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Fix deferred", "package_name": "shiro-core", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Fix deferred", "package_name": "shiro-core", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}], "public_date": "2026-02-10T09:25:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23901\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23901\nhttps://lists.apache.org/thread/mm1jct9b86jvnh3y44tj22xvjtx3xhhh"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2.0.7)"}}], "product": "shiro", "vendor": "apache"}], "analysis": {"en": {"generated_at": "2026-04-17T20:51:56.056120+00:00", "value": {"mitigation_remediation": ["Upgrade to Shiro 2.0.7 or later.", "Configure brute\u2011force protection and rate limiting on authentication endpoints.", "If an immediate upgrade is not possible, enforce uniform authentication response times to hide timing differences."], "summary": {"action": "Patch", "impact": "Timing-based User Enumeration"}, "threat_synthesis": {"affected_systems": "The affected products are Apache Shiro, a security framework employed by many Java applications. Versions 1.* and any 2.* release prior to 2.0.7 are vulnerable. Apache Software Foundation product Shiro 1.0 through 2.0.6 lacks the patch that neutralizes the timing inconsistency.", "description_and_impact": "Apache Shiro allows an attacker to determine whether a username exists purely by measuring the response time of authentication requests. Because the processing path differs for valid and invalid accounts, a brute\u2011force attacker can incrementally identify all legitimate usernames. The vulnerability is a timing attack, mapped to CWE\u2011208, and can lead to credential guessing and social engineering when used with other known weaknesses.", "risk_and_exploitability": "The CVSS base score is 1, indicating a low severity assessment. EPSS indicates a very low exploitation probability (<1%). The vulnerability is not listed in CISA's KEV catalog. Exploitation requires local or network access to the Shiro authentication interface and relies on accurately timing responses, which is typically feasible in a sandboxed or moderately privileged environment. Attackers would need no additional privileges, but would benefit from privileged or local execution to capture precise timing, thus the risk level remains low but non\u2011negligible."}}}}, "created": "2026-02-10T15:37:14.496196+00:00", "updated": "2026-04-17T21:00:12.707552+00:00", "vendors": ["apache", "apache$PRODUCT$shiro"]}