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COLRv1 PaintColrLayers DAG with shared layer subtrees causes unbounded CPU cost — RecursionStack only detects same-path cycles, not cross-branch reuse

Status: Open.

#221 In harfbuzz/ttf-parser;

· scadastrangelove opened on Jul 20, 2026

Composite glyphs referencing a shared component subtree cause unbounded CPU cost in glyf/gvar outlining (exponential in branching factor, not bounded by MAX_COMPONENTS)

Status: Open.

#220 In harfbuzz/ttf-parser;

· scadastrangelove opened on Jul 20, 2026

avar::map_value: unchecked i16 arithmetic can wrap on extreme AxisValueMap entries (correctness bug, not a security report)

Status: Open.

#219 In harfbuzz/ttf-parser;

· scadastrangelove opened on Jul 20, 2026

CFF2 BLEND operator can pop from an empty argument stack — same root cause as #80, unpatched in CFF2

Status: Open.

#218 In harfbuzz/ttf-parser;

· scadastrangelove opened on Jul 20, 2026

Cannot produce outlines for TrueType fonts with 65536 glyphs

Status: Open.

#213 In harfbuzz/ttf-parser;

· laurmaedje opened on Jun 4, 2026

Query about LazyOffsetArray16 iterator

Status: Open.

#211 In harfbuzz/ttf-parser;

· asibahi opened on Jan 10, 2026

Add support for InstanceRecord in fvar table

Status: Open.

#208 In harfbuzz/ttf-parser;

· Kumasan00 opened on Dec 17, 2025

Panics with assertion failed: core::mem::size_of::<VariationTuple>() <= 80

Status: Open.

#205 In harfbuzz/ttf-parser;

· lovelymono opened on Dec 5, 2025

Regular fonts with italic angle marked as italic

Status: Open.

#202 In harfbuzz/ttf-parser;

· kjarosh opened on Oct 12, 2025

Feature is missing nameid

Status: Open.

#201 In harfbuzz/ttf-parser;

· softmarshmallow opened on Sep 12, 2025

comparison with fontations/read-fonts

Status: Open.

#199 In harfbuzz/ttf-parser;

· softmarshmallow opened on Sep 2, 2025

Implement Apple hvgl and hvpm table

Status: Open.

#193 In harfbuzz/ttf-parser;

· yisibl opened on Jul 8, 2025