CVE-2026-105753

Summary

vLLM is an inference and serving engine for large language models. Prior to 0.28.0, the default mirrored multimodal LRU cache can commit a media hash in the frontend sender cache during multimodal rendering and before engine admission, while the engine receiver cache never receives the payload if that request is rejected. A later request reusing the same media hash causes MultiModalProcessorSenderCache to send no payload and MultiModalReceiverCache to reach an assertion with the message "Expected a cached item," producing a shared-service availability failure. This issue is fixed in version 0.28.0.

Affected Software

Weaknesses

• CWE-617: CWE-617: Reachable Assertion

References

• https://github.com/vllm-project/vllm/security/advisories/GHSA-ph3r-5jfg-f84f
• https://github.com/vllm-project/vllm/pull/46747
• https://github.com/vllm-project/vllm/pull/51897
• https://github.com/vllm-project/vllm/commit/396204230423b7cc6798300926b8fa30190d26a9
• https://github.com/vllm-project/vllm/releases/tag/v0.28.0

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