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[Feature]: NVFP4 MoE LoRA support (Cutlass)

feature requestNew feature or requestNew feature or request

Status: Open.

#42629 In vllm-project/vllm;

· bi1101 opened on May 14, 2026

macOS source checkout resolves to UnspecifiedPlatform (empty device_type)

Status: Open.

#42628 In vllm-project/vllm;

· ezylopx5 opened on May 14, 2026

[Bug]: LMCache cache miss

bugSomething isn't workingSomething isn't working

Status: Open.

#42625 In vllm-project/vllm;

· CallmeZhangChenchen opened on May 14, 2026

[Bug]: turboquant accuracy and speed are bad than bf16

bugSomething isn't workingSomething isn't working

Status: Open.

#42621 In vllm-project/vllm;

· zzz3bbb3 opened on May 14, 2026

[Bug]: Structured-output scheduler can keep advancing a terminated xgrammar matcher

bugSomething isn't workingSomething isn't working

Status: Open.

#42619 In vllm-project/vllm;

· NeilAlfred opened on May 14, 2026

[Bug] custom_all_reduce IPC handle fails with expandable_segments when DP>1 AND TP>1

Status: Open.

#42609 In vllm-project/vllm;

· jing-4369 opened on May 14, 2026

[Bug]: --enable-return-routed-experts crashes with AttributeError on non-MoE models after full model load (missing architecture compatibility check)

bugSomething isn't workingSomething isn't working

Status: Open.

#42593 In vllm-project/vllm;

· Redempt1onzzZZ opened on May 14, 2026

[Bug]: Using the /generative_scoring may cause shape mismatches in the rejection sampler, causing vllm serve to crash

bugSomething isn't workingSomething isn't working

Status: Open.

#42592 In vllm-project/vllm;

· namaenande opened on May 14, 2026

[Bug]: Security: /v2/embed endpoint bypasses API Key authentication in v0.20.2

bugSomething isn't workingSomething isn't working

Status: Open.

#42591 In vllm-project/vllm;

· dusthunter opened on May 14, 2026

[Bug]: DFlash speculative decoding crashes with dtype mismatch: float != c10::Half in qwen3_dflash.py

bugSomething isn't workingSomething isn't working

rocmRelated to AMD ROCmRelated to AMD ROCm

Status: Open.

#42588 In vllm-project/vllm;

· Arhab25 opened on May 14, 2026

[Bug]: vllm serve crashes at engine init for several --kv-cache-dtype values accepted by CLI (fp8_ds_mla, fp8_e5m2, fp8_inc, bfloat16)

bugSomething isn't workingSomething isn't working

Status: Open.

#42587 In vllm-project/vllm;

· Redempt1onzzZZ opened on May 14, 2026

Qwen3.5 + --enable-lora + TP=4 fails at startup in custom_all_reduce.cuh

Status: Open.

#42583 In vllm-project/vllm;

· RulinShao opened on May 14, 2026