CVE-2026-103243 json
LightLLM through 1.2.0 Server-Side Request Forgery via multimodal endpoints
published 2026-09-30 39 d ago modified 2026-10-02 37 d ago also EUVD-2026-89988
- cvss
- 5.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
LightLLM through 1.2.0 fails to validate image_url and audio_url parameters in multimodal endpoints, allowing unauthenticated attackers to perform server-side request forgery. Attackers can supply arbitrary URLs to fetch internal resources, with vision model processing disclosing content or error responses revealing internal network topology.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 37 d ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/ModelTC/LightLLM/issues/1608 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N |
| CNA | 3.1 | 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- ModelTC LightLLM
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/ModelTC/LightLLM/issues/1608
issue-tracking, exploit
-
github.com
/ModelTC/lightllm/blob/v1.2.0/lightllm/utils/multimodal_utils.py#L82-L91
technical-description
-
github.com
/ModelTC/lightllm/blob/v1.2.0/lightllm/server/multimodal_params.py#L149
technical-description
-
github.com
/ModelTC/LightLLM
product
-
vulncheck.com
/advisories/lightllm-through-1.2.0-server-side-request-forgery-via-multimodal-endpoints
third-party-advisory
Sources
- CVE List CVE-2026-103243
- NVD CVE-2026-103243
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.