CVE-2026-121938

langchain4j-aideepin before 3.31.0 IDOR via GET /character/{uuid}

Published Nov 4, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Moyangzhan
Moyangzhan langchain4j-aideepin
Vendors & Products Moyangzhan
Moyangzhan langchain4j-aideepin
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title langchain4j-aideepin before 3.31.0 IDOR via GET /character/{uuid}
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 4, 2026, 6:50 PM
Reserved
Nov 4, 2026, 12:05 PM
Status
Deferred
Published
Nov 4, 2026, 1:17 PM
Modified
Nov 12, 2026, 9:36 PM