{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-104733", "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c", "state": "PUBLISHED", "assignerShortName": "NCSC.ch", "dateReserved": "2026-10-02T11:49:34.103Z", "datePublished": "2026-10-02T12:19:10.635Z", "dateUpdated": "2026-10-02T16:57:18.308Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "455daabc-a392-441d-aa46-37d35189897c", "shortName": "NCSC.ch", "dateUpdated": "2026-10-02T12:19:10.635Z"}, "title": "User Impersonation/Authorization Bypass in XMPP Server ejabberd", "datePublic": "2026-07-31T09:01:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "description": "User Impersonation"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Authorization Bypass"}]}], "affected": [{"vendor": "ProcessOne", "product": "ejabberd", "platforms": ["MacOS", "Linux"], "repo": "https://github.com/processone/ejabberd", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "26.04", "changes": [{"at": "26.07", "status": "unaffected"}], "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "User Impersonation in ProcessOnes XMMP Server ejabberd &lt;= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism."}]}], "references": [{"url": "https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/", "tags": ["third-party-advisory"]}, {"url": "https://github.com/processone/ejabberd/releases#release-26.07", "tags": ["release-notes"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "PROOF_OF_CONCEPT", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.4, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P"}}], "workarounds": [{"lang": "en", "value": "Disable the SALS-PLAIN authentication mechanism", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Disable the SALS-PLAIN authentication mechanism"}]}], "solutions": [{"lang": "en", "value": "Update to the latest version of ejabberd (26.07)", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Update to the latest version of ejabberd (26.07)"}]}], "credits": [{"lang": "en", "value": "Marius Schwarz (NSIDE ATTACK LOGIC GmbH)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-290", "lang": "en", "description": "CWE-290 Authentication Bypass by Spoofing"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-02T16:56:58.717189Z", "id": "CVE-2026-104733", "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": "2026-10-02T16:57:18.308Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "platforms": ["MacOS", "Linux"], "product": "ejabberd", "repo": "https://github.com/processone/ejabberd", "vendor": "ProcessOne", "versions": [{"changes": [{"at": "26.07", "status": "unaffected"}], "lessThanOrEqual": "26.04", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "vulnerability@ncsc.ch"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism."}], "id": "CVE-2026-104733", "lastModified": "2026-10-02T13:17:45.010", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P/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": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "vulnerability@ncsc.ch", "type": "Secondary"}]}, "published": "2026-10-02T13:17:45.010", "references": [{"source": "vulnerability@ncsc.ch", "url": "https://github.com/processone/ejabberd/releases#release-26.07"}, {"source": "vulnerability@ncsc.ch", "url": "https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/"}], "sourceIdentifier": "vulnerability@ncsc.ch", "vulnStatus": "Received"}

{}

{"created": "2026-10-02T13:30:06.417597+00:00", "updated": "2026-10-02T13:30:06.417602+00:00", "vendors": [], "weaknesses": ["CWE-284"]}