{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-121938","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-04T12:05:49.176Z","datePublished":"2026-11-04T12:31:17.804Z","dateUpdated":"2026-11-04T18:50:28.489Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-04T12:31:17.804Z"},"datePublic":"2026-10-22T14:19:29.000Z","title":"langchain4j-aideepin before 3.31.0 IDOR via GET /character/{uuid}","descriptions":[{"lang":"en","value":"langchain4j-aideepin before 3.31.0 contains an insecure direct object reference vulnerability that allows authenticated users to read other users' character-chat conversations by supplying their character uuid. Attackers can request GET /character/{uuid}, which CharacterService.detail resolves without an ownership check, to obtain victims' questions, AI answers, and attachment and audio URLs."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Authorization Bypass Through User-Controlled Key","cweId":"CWE-639","type":"CWE"}]}],"affected":[{"vendor":"moyangzhan","product":"langchain4j-aideepin","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"3.31.0","status":"affected","versionType":"semver"}],"packageURL":"pkg:github/moyangzhan/langchain4j-aideepin","repo":"https://github.com/moyangzhan/langchain4j-aideepin"}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/moyangzhan/langchain4j-aideepin/issues/116","tags":["issue-tracking"]},{"url":"https://hackmd.io/@hieuPenguinnn/langchain4j-aideepin-character-conversation-cross-user-idor","tags":["third-party-advisory"]},{"url":"https://github.com/moyangzhan/langchain4j-aideepin/pull/117","tags":["issue-tracking","patch"]},{"url":"https://github.com/moyangzhan/langchain4j-aideepin/commit/9b2fee6b66836a0efd5599cfcddd05b80b05ca93","tags":["patch"]},{"url":"https://github.com/moyangzhan/langchain4j-aideepin/blob/v3.30.0/server/adi-common/src/main/java/com/moyz/adi/common/service/CharacterService.java#L105-L125","tags":["technical-description"]},{"name":"VulnCheck Advisory: langchain4j-aideepin before 3.31.0 IDOR via GET /character/{uuid}","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/langchain4j-aideepin-before-3.31.0-idor-via-get-character-uuid"}],"credits":[{"lang":"en","value":"hieuPenguinnn","type":"finder"},{"lang":"en","value":"Matthew-james11","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"references":[{"url":"https://hackmd.io/@hieuPenguinnn/cve-2026-121938-langchain4j-aideepin-character-conversation-cross-user-idor","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-04T18:50:02.027188Z","id":"CVE-2026-121938","options":[{"Exploitation":"poc"},{"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":"2026-11-04T18:50:28.489Z"}}]}}