What is CVE-2026-103395?

CVE-2026-103395 is a critical-severity vulnerability in Modeltc Lightllm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-09-30.

How severe is CVE-2026-103395?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Modeltc Lightllm

CVE-2026-103395

LightLLM through 1.2.0 visual_only deployments expose an unauthenticated RPyC service with allow_pickle enabled that deserializes attacker-supplied arguments in the remote_infer_images method. Attackers can reach the visual RPyC port and pass objects with __reduce__ methods to execute arbitrary code with service account privileges.

Vulnerability class: Insecure Deserialization

Published 2026-09-30 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Modeltc Lightllm

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

github.com/ModelTC/LightLLM/issues/1610 (issue-tracking)
github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/visualserver/objs.py (technical-description)
github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/visualserver/visual_onl… (technical-description)
github.com/ModelTC/LightLLM (product)
www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code… (third-party-advisory)

Frequently asked questions

What is CVE-2026-103395?: CVE-2026-103395 is a critical-severity vulnerability in Modeltc Lightllm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-09-30.
How severe is CVE-2026-103395?: Critical severity. CVSS v3 base score is 9.8 out of 10.