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Regression in RandomForestClassifier predictions for onnxruntime 1.26.0

Status: Open.

#28557 In microsoft/onnxruntime;

· betatim opened on May 19, 2026

MatMulNBits bits=2 + float zero_point CPU path is ~20× slower than bits=4 (naive scalar fallback)

Status: Open.

#28552 In microsoft/onnxruntime;

· justinchuby opened on May 19, 2026

MatMulNBits silently outputs zeros for block_size=512 on CPU EP

Status: Open.

#28551 In microsoft/onnxruntime;

· justinchuby opened on May 18, 2026

MatMulNBits: support 1.25-bit ternary Sherry / STQ1_0 quantization

ep:ACLissues related to ACL execution providerissues related to ACL execution provider

ep:WebGPUort-web webgpu providerort-web webgpu provider

platform:mobileissues related to ONNX Runtime mobile; typically submitted using templateissues related to ONNX Runtime mobile; typically submitted using template

platform:webissues related to ONNX Runtime web; typically submitted using templateissues related to ONNX Runtime web; typically submitted using template

quantizationissues related to quantizationissues related to quantization

Status: Open.

#28549 In microsoft/onnxruntime;

· justinchuby opened on May 18, 2026

[WebGPU] GatherBlockQuantized fails to compile Metal shader on macos-15 GitHub-hosted runner after a few sessions

ep:WebGPUort-web webgpu providerort-web webgpu provider

platform:webissues related to ONNX Runtime web; typically submitted using templateissues related to ONNX Runtime web; typically submitted using template

quantizationissues related to quantizationissues related to quantization

Status: Open.

#28545 In microsoft/onnxruntime;

· TimPietrusky opened on May 18, 2026

[Mobile] XNNPACK transpose-optimizer + Conv+Relu fanout fusion produces invalid graph (missing input node_28)

ep:Xnnpackissues related to XNNPACK EPissues related to XNNPACK EP

platform:mobileissues related to ONNX Runtime mobile; typically submitted using templateissues related to ONNX Runtime mobile; typically submitted using template

Status: Open.

#28544 In microsoft/onnxruntime;

· kadu-v opened on May 18, 2026

[Mobile] XNNPACK MaxPool + Relu fanout fusion produces invalid graph (missing input pool_src)

ep:Xnnpackissues related to XNNPACK EPissues related to XNNPACK EP

platform:mobileissues related to ONNX Runtime mobile; typically submitted using templateissues related to ONNX Runtime mobile; typically submitted using template

Status: Open.

#28543 In microsoft/onnxruntime;

· kadu-v opened on May 18, 2026

[Mobile] XNNPACK + ORT_ENABLE_ALL invalid graph after ConvMulFusion (missing input node_28)

ep:Xnnpackissues related to XNNPACK EPissues related to XNNPACK EP

platform:mobileissues related to ONNX Runtime mobile; typically submitted using templateissues related to ONNX Runtime mobile; typically submitted using template

Status: Open.

#28540 In microsoft/onnxruntime;

· kadu-v opened on May 18, 2026

[Feature Request] Allow IO binding on run async

feature requestrequest for unsupported feature or enhancementrequest for unsupported feature or enhancement

Status: Open.

#28539 In microsoft/onnxruntime;

· geobeau opened on May 18, 2026

[Build] Cannot build onnxruntime with CUDA enabled and contrib ops disabled

buildbuild issues; typically submitted using templatebuild issues; typically submitted using template

ep:CUDAissues related to the CUDA execution providerissues related to the CUDA execution provider

Status: Open.

#28537 In microsoft/onnxruntime;

· sevenc-nanashi opened on May 18, 2026

[Web] Conv2DMatMul and matmul-shaders.ts still use raw workgroupId, silently incorrect when NormalizeDispatchGroupSize reshapes

ep:WebGPUort-web webgpu providerort-web webgpu provider

platform:webissues related to ONNX Runtime web; typically submitted using templateissues related to ONNX Runtime web; typically submitted using template

Status: Open.

#28536 In microsoft/onnxruntime;

· nicholascelestin opened on May 18, 2026

POM contains published-with-gradle-metadata marker but .module file is not published to Maven Central

api:Javaissues related to the Java APIissues related to the Java API

Status: Open.

#28532 In microsoft/onnxruntime;

· sureshg opened on May 17, 2026