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IndexEDEN / IndexIVFEDEN with unbiased 1-bit EDEN can return negative METRIC_L2 distances

Status: Open.

#5567 In facebookresearch/faiss;

· leemeii opened on Sep 3, 2026

IndexIVFFlatDedup.remove_ids returns 0 and does not decrement ntotal after removing a duplicate-vector ID

Status: Open.

#5566 In facebookresearch/faiss;

· leemeii opened on Sep 3, 2026

METRIC_Canberra produces NaN for shared-zero dimensions, causing valid neighbors to be dropped

Status: Open.

#5557 In facebookresearch/faiss;

· leemeii opened on Sep 2, 2026

IndexBinaryIVF count scanner treats max_codes=0 as a zero scan budget

Status: Open.

#5555 In facebookresearch/faiss;

· leemeii opened on Sep 2, 2026

QT_8bit_direct_signed takes the integer distance computer on x86 and the float one on aarch64

Status: Open.

#5550 In facebookresearch/faiss;

· mark124 opened on Sep 1, 2026

IndexHNSW ignores SearchParameters.sel when bounded_queue=False

Status: Open.

#5504 In facebookresearch/faiss;

· mmnhgo opened on Aug 6, 2026

Feature proposal: Projection-Augmented Graph as a new CPU ANN index

Status: Open.

#5496 In facebookresearch/faiss;

· KejingLu-810 opened on Aug 2, 2026

Support HNSW Search using GPUs

Status: Open.

#5458 In facebookresearch/faiss;

· premal opened on Jul 23, 2026

Support for free-threaded (no-GIL) Python builds

feature request

Status: Open.

Feature

#5418 In facebookresearch/faiss;

· rafalh opened on Jul 14, 2026

IndexIVFFlat with METRIC_L1 changes nprobe=1 Top-k after translating all vectors and queries

Status: Open.

#5410 In facebookresearch/faiss;

· mmnhgo opened on Jul 12, 2026

CUDA context pollution

backlog

Status: Open.

#5371 In facebookresearch/faiss;

· oseanblue opened on Jul 3, 2026

IndexHNSWFlat can return invalid L2 results after IndexFlatL2 sync_l2norms() followed by add()

Status: Open.

#5320 In facebookresearch/faiss;

· mmnhgo opened on Jun 18, 2026