# CVE-2026-125386: langchain4j-aideepin through 3.32.0 IDOR via /character/message reference endpoints

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

langchain4j-aideepin through 3.32.0 contains an insecure direct object reference vulnerability in CharacterMessageController that allows authenticated users to access other users' message references due to missing owner checks. Attackers can supply another user's message uuid to the knowledge-embedding-ref, memory-embedding-ref, or graph-ref endpoints to retrieve knowledge-base chunks, long-term memory text, and knowledge-graph data.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/moyangzhan/langchain4j-aideepin/commit/483499b1a6b4a27d856f85d88c28ae6152660953

## Affected products and versions

- moyangzhan / langchain4j-aideepin: ≥ 0; ≤ 3.32.0 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6 (medium); 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; source: CNA: VulnCheck

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/moyangzhan/langchain4j-aideepin/issues/118 (CNA: VulnCheck; issue-tracking)

- https://github.com/moyangzhan/langchain4j-aideepin (CNA: VulnCheck; product)

- https://github.com/moyangzhan/langchain4j-aideepin/blob/v3.32.0/server/adi-common/src/main/resources/mapper/CharacterMessageRefMemoryEmbeddingMapper.xml#L4-L10 (CNA: VulnCheck; technical-description)

- https://github.com/moyangzhan/langchain4j-aideepin/commit/483499b1a6b4a27d856f85d88c28ae6152660953 (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/langchain4j-aideepin-through-3.32.0-idor-via-character-message-reference-endpoints (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-125386; retrieved 2026-11-10; source updated 2026-11-09

Revision: 1d950eedc6e901bf017c84a1ad53b4b3e9e4c7c8580843330d90e03b532dcb76

Canonical: https://y2.dev/cve/CVE-2026-125386

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