{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21874", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-05T16:44:16.369Z", "datePublished": "2026-01-08T09:50:47.247Z", "dateUpdated": "2026-01-08T14:43:50.018Z"}, "containers": {"cna": {"title": "NiceGUI has Redis connection leak via tab storage causes service degradation", "problemTypes": [{"descriptions": [{"cweId": "CWE-772", "lang": "en", "description": "CWE-772: Missing Release of Resource after Effective Lifetime", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2"}, {"name": "https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83", "tags": ["x_refsource_MISC"], "url": "https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83"}, {"name": "https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0"}], "affected": [{"vendor": "zauberzeug", "product": "nicegui", "versions": [{"version": ">= 2.10.0, < 3.5.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-01-08T09:50:47.247Z"}, "descriptions": [{"lang": "en", "value": "NiceGUI is a Python-based UI framework. From versions v2.10.0 to 3.4.1, an unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit. NiceGUI continues accepting new connections - errors are logged but the app stays up with broken storage functionality. This issue has been patched in version 3.5.0."}], "source": {"advisory": "GHSA-mp55-g7pj-rvm2", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-08T14:43:46.386940Z", "id": "CVE-2026-21874", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"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": "2026-01-08T14:43:50.018Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21874", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-05T16:44:16.369Z", "datePublished": "2026-01-08T09:50:47.247Z", "dateUpdated": "2026-01-08T14:43:50.018Z"}, "containers": {"cna": {"title": "NiceGUI has Redis connection leak via tab storage causes service degradation", "problemTypes": [{"descriptions": [{"cweId": "CWE-772", "lang": "en", "description": "CWE-772: Missing Release of Resource after Effective Lifetime", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2"}, {"name": "https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83", "tags": ["x_refsource_MISC"], "url": "https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83"}, {"name": "https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0"}], "affected": [{"vendor": "zauberzeug", "product": "nicegui", "versions": [{"version": ">= 2.10.0, < 3.5.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-01-08T09:50:47.247Z"}, "descriptions": [{"lang": "en", "value": "NiceGUI is a Python-based UI framework. From versions v2.10.0 to 3.4.1, an unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit. NiceGUI continues accepting new connections - errors are logged but the app stays up with broken storage functionality. This issue has been patched in version 3.5.0."}], "source": {"advisory": "GHSA-mp55-g7pj-rvm2", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-21874", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-08T14:43:46.386940Z"}}}], "references": [{"url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-08T14:43:38.996Z"}}]}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "NiceGUI is a Python-based UI framework. From versions v2.10.0 to 3.4.1, an unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit. NiceGUI continues accepting new connections - errors are logged but the app stays up with broken storage functionality. This issue has been patched in version 3.5.0."}], "id": "CVE-2026-21874", "lastModified": "2026-01-08T18:08:18.457", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-01-08T10:15:55.820", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83"}, {"source": "security-advisories@github.com", "url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"created": "2026-01-09T13:25:42.913892+00:00", "updated": "2026-01-09T13:25:42.913929+00:00", "vendors": ["zauberzeug", "zauberzeug$PRODUCT$nicegui"]}