CVE-2026-45677

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45677", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-12T21:59:25.666Z", "datePublished": "2026-06-24T20:54:13.059Z", "dateUpdated": "2026-06-25T13:41:12.096Z"}, "containers": {"cna": {"title": "Rocket.Chat: Lack of SAML Signature Check During Logout Could Lead To DoS", "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-pw6f-q8ww-vqfq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-pw6f-q8ww-vqfq"}], "affected": [{"vendor": "RocketChat", "product": "Rocket.Chat", "versions": [{"version": ">= 8.5.0-rc.0, < 8.5.0", "status": "affected"}, {"version": ">= 8.4.0-rc.0, < 8.4.1", "status": "affected"}, {"version": ">= 8.3.0-rc.0, < 8.3.3", "status": "affected"}, {"version": ">= 8.2.0-rc.0, < 8.2.3", "status": "affected"}, {"version": ">= 8.1.0-rc.0, < 8.1.4", "status": "affected"}, {"version": ">= 8.0.0-rc.0, < 8.0.5", "status": "affected"}, {"version": ">= 7.11.0-rc.0, < 7.13.7", "status": "affected"}, {"version": "< 7.10.11", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T20:54:13.059Z"}, "descriptions": [{"lang": "en", "value": "Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML integration does not verify the signature on inbound LogoutRequest messages. An unauthenticated remote attacker who knows a target user's SAML NameID - which major identity providers (Okta, Google Workspace, Microsoft Entra ID, JumpCloud) expose as the user's email address - can craft a valid-looking unsigned LogoutRequest and submit it to the SP logout endpoint. The server processes it as legitimate, immediately destroying the victim's session. Because the attack requires no authentication and no interaction from the victim, it can be repeated in a loop against individual users or scripted across many accounts, effectively rendering the Rocket.Chat instance unusable for SAML-authenticated users. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11."}], "source": {"advisory": "GHSA-pw6f-q8ww-vqfq", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-25T13:40:53.521845Z", "id": "CVE-2026-45677", "options": [{"Exploitation": "none"}, {"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": "2026-06-25T13:41:12.096Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"cna": {"title": "Rocket.Chat: Lack of SAML Signature Check During Logout Could Lead To DoS", "source": {"advisory": "GHSA-pw6f-q8ww-vqfq", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 8.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE"}}], "affected": [{"vendor": "RocketChat", "product": "Rocket.Chat", "versions": [{"status": "affected", "version": ">= 8.5.0-rc.0, < 8.5.0"}, {"status": "affected", "version": ">= 8.4.0-rc.0, < 8.4.1"}, {"status": "affected", "version": ">= 8.3.0-rc.0, < 8.3.3"}, {"status": "affected", "version": ">= 8.2.0-rc.0, < 8.2.3"}, {"status": "affected", "version": ">= 8.1.0-rc.0, < 8.1.4"}, {"status": "affected", "version": ">= 8.0.0-rc.0, < 8.0.5"}, {"status": "affected", "version": ">= 7.11.0-rc.0, < 7.13.7"}, {"status": "affected", "version": "< 7.10.11"}]}], "references": [{"url": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-pw6f-q8ww-vqfq", "name": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-pw6f-q8ww-vqfq", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML integration does not verify the signature on inbound LogoutRequest messages. An unauthenticated remote attacker who knows a target user's SAML NameID - which major identity providers (Okta, Google Workspace, Microsoft Entra ID, JumpCloud) expose as the user's email address - can craft a valid-looking unsigned LogoutRequest and submit it to the SP logout endpoint. The server processes it as legitimate, immediately destroying the victim's session. Because the attack requires no authentication and no interaction from the victim, it can be repeated in a loop against individual users or scripted across many accounts, effectively rendering the Rocket.Chat instance unusable for SAML-authenticated users. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-862", "description": "CWE-862: Missing Authorization"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T20:54:13.059Z"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-45677", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-25T13:40:53.521845Z"}}}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2026-06-25T13:40:56.428Z"}}]}, "cveMetadata": {"cveId": "CVE-2026-45677", "state": "PUBLISHED", "dateUpdated": "2026-06-24T20:54:13.059Z", "dateReserved": "2026-05-12T21:59:25.666Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-06-24T20:54:13.059Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "Rocket.Chat", "vendor": "RocketChat", "versions": [{"status": "affected", "version": ">= 8.5.0-rc.0, < 8.5.0"}, {"status": "affected", "version": ">= 8.4.0-rc.0, < 8.4.1"}, {"status": "affected", "version": ">= 8.3.0-rc.0, < 8.3.3"}, {"status": "affected", "version": ">= 8.2.0-rc.0, < 8.2.3"}, {"status": "affected", "version": ">= 8.1.0-rc.0, < 8.1.4"}, {"status": "affected", "version": ">= 8.0.0-rc.0, < 8.0.5"}, {"status": "affected", "version": ">= 7.11.0-rc.0, < 7.13.7"}, {"status": "affected", "version": "< 7.10.11"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML integration does not verify the signature on inbound LogoutRequest messages. An unauthenticated remote attacker who knows a target user's SAML NameID - which major identity providers (Okta, Google Workspace, Microsoft Entra ID, JumpCloud) expose as the user's email address - can craft a valid-looking unsigned LogoutRequest and submit it to the SP logout endpoint. The server processes it as legitimate, immediately destroying the victim's session. Because the attack requires no authentication and no interaction from the victim, it can be repeated in a loop against individual users or scripted across many accounts, effectively rendering the Rocket.Chat instance unusable for SAML-authenticated users. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11."}, {"lang": "es", "value": "Rocket.Chat es una plataforma de comunicaciones de c\u00f3digo abierto, segura y totalmente personalizable. Antes de las versiones 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7 y 7.10.11, la integraci\u00f3n SAML de Rocket.Chat no verifica la firma en los mensajes entrantes de LogoutRequest. Un atacante remoto no autenticado que conoce el SAML NameID de un usuario objetivo -que los principales proveedores de identidad (Okta, Google Workspace, Microsoft Entra ID, JumpCloud) exponen como la direcci\u00f3n de correo electr\u00f3nico del usuario- puede crear un LogoutRequest sin firmar con apariencia v\u00e1lida y enviarlo al endpoint de cierre de sesi\u00f3n del SP. El servidor lo procesa como leg\u00edtimo, destruyendo inmediatamente la sesi\u00f3n de la v\u00edctima. Dado que el ataque no requiere autenticaci\u00f3n ni interacci\u00f3n de la v\u00edctima, puede repetirse en un bucle contra usuarios individuales o programarse para muchas cuentas, dejando la instancia de Rocket.Chat inutilizable para los usuarios autenticados por SAML. Esta vulnerabilidad est\u00e1 corregida en las versiones 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7 y 7.10.11."}], "id": "CVE-2026-45677", "lastModified": "2026-10-25T22:10:00.150", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45677", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-25T13:40:53.521845Z", "version": "2.0.3"}}]}, "published": "2026-06-24T21:16:53.590", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-pw6f-q8ww-vqfq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.5.0-rc.0,8.5.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.4.0-rc.0,8.4.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.3.0-rc.0,8.3.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.2.0-rc.0,8.2.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.1.0-rc.0,8.1.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0-rc.0,8.0.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.11.0-rc.0,7.13.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.10.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Rocket.Chat", "source": "cna", "vendor": "RocketChat"}, "product": "rocket.chat", "vendor": "rocketchat"}], "created": "2026-06-24T23:15:03.149632+00:00", "updated": "2026-06-25T05:45:02.760310+00:00", "vendors": ["rocketchat", "rocketchat$PRODUCT$rocket.chat"]}