Issues

• [c++] SHAP computation crashes if run after model.update() or in training callback

  bug
  lightgbm-org/LightGBM#7488 · Filter by author ron-wettenstein opened on Oct 6, 2026
  1

• [Question] Should ranking groups be set after loading validation rows?

  question
  lightgbm-org/LightGBM#7486 · Filter by author matouskozak opened on Oct 5, 2026
  1

• Bug in linear_tree with missing data and 0 coefficients

  question
  lightgbm-org/LightGBM#7484 · Filter by author divir94 opened on Oct 4, 2026

• regression_l1 and quantile loss are ~6-8x slower with sample weights (mape always)

  lightgbm-org/LightGBM#7479 · Filter by author SirPopiel opened on Oct 1, 2026

• Use QuadratureTreeSHAP for Shapley value computation

  efficiencyfeature request
  lightgbm-org/LightGBM#7477 · Filter by author ron-wettenstein opened on Sep 29, 2026
  4

• [ci] expand testing (tracking issue)

  gpu (CUDA)gpu (OpenCL)gpu (ROCm)maintenancer-package
  lightgbm-org/LightGBM#7470 · Filter by author jameslamb opened on Sep 29, 2026

• [ci] separate build and test jobs

  maintenance
  lightgbm-org/LightGBM#7462 · Filter by author jameslamb opened on Sep 27, 2026
  

• [Tracking] Distributed training improvements

  daskeffectivenessefficiency
  lightgbm-org/LightGBM#7443 · Filter by author xiaoh1024 opened on Sep 21, 2026

• Out-of-bounds read via unvalidated out-of-range left_child/right_child node indices during ordinary tree traversal

  lightgbm-org/LightGBM#7438 · Filter by author geo-chen opened on Sep 14, 2026

• Out-of-bounds read via unchecked categorical-split threshold indexing cat_boundaries_

  lightgbm-org/LightGBM#7437 · Filter by author geo-chen opened on Sep 14, 2026

• JSONDecodeError on model load when trained with ignore_column

  lightgbm-org/LightGBM#7432 · Filter by author m10an opened on Sep 10, 2026

• [CUDA] Training crashes when a categorical feature has more than 256 categories (illegal memory access / invalid argument)

  lightgbm-org/LightGBM#7417 · Filter by author FlorinAndrei opened on Sep 1, 2026

• [RFC] macOS Intel (x86_64) support

  maintenancequestion
  lightgbm-org/LightGBM#7412 · Filter by author jameslamb opened on Aug 29, 2026

• [python-package] LGBMClassifier does not label-encode eval_y

  bug
  lightgbm-org/LightGBM#7400 · Filter by author xmatthias opened on Aug 18, 2026
  3

• [ci] [python-package] Dask 'no_early_stopping' test failing (clang + Python 3.14 only)

  blockingdaskmaintenance
  lightgbm-org/LightGBM#7391 · Filter by author jameslamb opened on Aug 8, 2026

• [RFC] remove parser_config_file and related code?

  awaiting reviewbreakingmaintenance
  lightgbm-org/LightGBM#7381 · Filter by author jameslamb opened on Jul 26, 2026
  1

• [ci] [R-package] add a CI job ensuring tests pass when suggested dependencies are unavailable

  maintenancer-package
  lightgbm-org/LightGBM#7367 · Filter by author jameslamb opened on Jul 18, 2026

• feature: generalize built-in categorical encoding (not specific to "pandas")

  feature request
  lightgbm-org/LightGBM#7361 · Filter by author jameslamb opened on Jul 14, 2026

• [c++] Out-of-bounds write (and read) when loading and predicting with an untrusted text model

  bug
  lightgbm-org/LightGBM#7357 · Filter by author geo-chen opened on Jul 10, 2026
  3

• [RFC] stop using conda for Python CI jobs

  awaiting reviewmaintenance
  lightgbm-org/LightGBM#7355 · Filter by author jameslamb opened on Jul 10, 2026
  1

  

• [python-package] feature_names_in_ spaces replaced by underlines incompatible with sklearn

  bug
  lightgbm-org/LightGBM#7338 · Filter by author ThibaultDECO opened on Jun 19, 2026
  4

  

• [python-package] Speed up 'import lightgbm' (Summer 2026 edition)

  efficiencymaintenance
  lightgbm-org/LightGBM#7327 · Filter by author jameslamb opened on Jun 2, 2026
  2

  

• [python-package] speed up Booster.predict() (Summer 2026 edition)

  efficiency
  lightgbm-org/LightGBM#7326 · Filter by author jameslamb opened on Jun 2, 2026
  

• LightGBM C API Crash Report: LGBM_BoosterPredictForMat SIGSEGV (v4.6.0.99)

  lightgbm-org/LightGBM#7325 · Filter by author snailwei opened on Jun 1, 2026

• [ci] [dask] Dask tests on macOS are very expensive

  daskmaintenance
  lightgbm-org/LightGBM#7295 · Filter by author jameslamb opened on May 24, 2026
  3