vLLM has a Weakness in MultiModalHasher Image Hashing Implementation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
vLLM is an inference and serving engine for large language models (LLMs). In versions starting from 0.7.0 to before 0.9.0, in the file vllm/multimodal/hasher.py, the MultiModalHasher class has a security and data integrity issue in its image hashing method. Currently, it serializes PIL.Image.Image objects using only obj.tobytes(), which returns only the raw pixel data, without including metadata such as the image’s shape (width, height, mode). As a result, two images of different sizes (e.g., 30x100 and 100x30) with the same pixel byte sequence could generate the same hash value. This may lead to hash collisions, incorrect cache hits, and even data leakage or security risks. This issue has been patched in version 0.9.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vllm-project | vllm | 0.7.0 to before 0.9.0 | 0.9.0 | Patch available | CNA |
| — | vllm (PyPI) | 0.7.0 to before 0.9.0 | 0.9.0 | Patch available | GHSA-c65p-x677-fgj6 |
- vllm Vendorvllm-project Affected 0.7.0 to before 0.9.0 Fixed in 0.9.0 Patch available CNA
- vllm (PyPI) Vendor— Affected 0.7.0 to before 0.9.0 Fixed in 0.9.0 Patch available GHSA-c65p-x677-fgj6
Remediation
- Fix · CNA vllm (vllm-project) Fixed in 0.9.0
- Fix · GHSA-c65p-x677-fgj6 vllm (PyPI) Fixed in 0.9.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat AI Inference Server | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-46722
- 2026-10-03 Alias added: GHSA-c65p-x677-fgj6
References
Patch 2
Advisory 2
More vllm-project vulnerabilities
- TI-2024-10229 Remote Code Execution in vllm-project/vllm CVSS 3.0CRITICAL 9.8
- TI-2024-08404 Remote Code Execution in vllm-project/vllm CVSS 3.1CRITICAL 9.8
- TI-2026-36017 vLLM: OpenAI auth bypass CVSS 3.1CRITICAL 9.1
- TI-2026-63056 vLLM before 0.28.0 Denial of Service via negative token ID CVSS 4.0HIGH 8.7
- TI-2026-04308 Hardcoded trust_remote_code=True in vllm-project/vllm Bypasses User Security Control CVSS 3.0HIGH 8.8
- TI-2026-39137 vLLM: Remote DoS in vLLM via Invalid Recovered Token Reinjection CVSS 3.1HIGH 7.5
Sources
- CVE-2025-46722 · CVE Program
- CVE-2025-46722 · NVD
- FIRST EPSS
- GHSA-c65p-x677-fgj6 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-46722 · Red Hat security data · CC BY 4.0
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