Version 6.13.3, 2026-06-17

What's new

Security (SEC)

• Apply MAX_DECLARED_STREAM_LENGTH to streams without length as well (#3871) by @stefan6419846

Performance Improvements (PI)

• Avoid per-pixel getpixel loop for 1-bit indexed images (#3854) by @Samuel-Harris

Robustness (ROB)

• Several fixes by @metsw24-max

Maintenance (MAINT)

• Make mypy assert messages consistent (#3849) by @j-t-1

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