{"id":"CVE-2026-28474","state":"PUBLISHED","title":"OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing","description":"OpenClaw's Nextcloud Talk plugin versions prior to 2026.2.6 accept equality matching on the mutable actor.name display name field for allowlist validation, allowing attackers to bypass DM and room allowlists. An attacker can change their Nextcloud display name to match an allowlisted user ID and gain unauthorized access to restricted conversations.","publishedAt":"2026-03-05T21:59:49.849Z","updatedAt":"2026-09-17T17:54:15.431Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["OpenClaw nextcloud-talk"],"affected":[{"vendor":"OpenClaw","product":"nextcloud-talk","packageURL":"pkg:npm/%40openclaw/nextcloud-talk","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2026.2.6","versionType":"custom"}]}],"references":["https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r","https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d","https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofing"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/28xxx/CVE-2026-28474.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28474","state":"PUBLISHED","datePublished":"2026-03-05T21:59:49.849Z","dateUpdated":"2026-09-17T17:54:15.431Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-02-27T19:19:46.447Z"},"containers":{"cna":{"title":"OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing","descriptions":[{"lang":"en","value":"OpenClaw's Nextcloud Talk plugin versions prior to 2026.2.6 accept equality matching on the mutable actor.name display name field for allowlist validation, allowing attackers to bypass DM and room allowlists. An attacker can change their Nextcloud display name to match an allowlisted user ID and gain unauthorized access to restricted conversations."}],"affected":[{"vendor":"OpenClaw","product":"nextcloud-talk","packageURL":"pkg:npm/%40openclaw/nextcloud-talk","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2026.2.6","versionType":"custom"}]}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r","name":"GitHub Security Advisory (GHSA-r5h9-vjqc-hq3r)","tags":["vendor-advisory"]},{"url":"https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d","name":"Patch Commit #1","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/openclaw-nextcloud-talk-allowlist-bypass-via-actorname-display-name-spoofing","name":"VulnCheck Advisory: OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"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:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-17T17:54:15.431Z"},"datePublic":"2026-02-14T00:00:00.000Z","credits":[{"lang":"en","value":"@MegaManSec (https://joshua.hu) of AISLE Research Team","type":"reporter"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-09T18:07:43.724179Z","id":"CVE-2026-28474","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-09T18:08:50.134Z"}}]}}}