CVE-2026-121938

MediumCVSS 5.3/10Last modified Nov 12, 2026

Description

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-639

Affected software

Vendor	Product	Versions
moyangzhan	langchain4j-aideepin	< 3.31.0

References

Timeline

Published: Nov 4, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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