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NEWS.md: add security fixes and merged PRs (#6780, #6781, #6783) #6784

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Merged
matz merged 1 commit into from
Apr 13, 2026
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NEWS.md: add security fixes and merged PRs (#6780, #6781, #6783) #6784

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5 changes: 5 additions & 0 deletions NEWS.md
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Expand Up @@ -340,6 +340,9 @@ Other optimizations:
- [#6762](https://github.com/mruby/mruby/pull/6762) Write generated test C files atomically to avoid build race condition
- [#6765](https://github.com/mruby/mruby/pull/6765) Fix `Lazy#flat_map` to handle non-enumerable block return values
- [#6767](https://github.com/mruby/mruby/pull/6767) Allow compound statement in parenthesized argument context
- [#6780](https://github.com/mruby/mruby/pull/6780) Fix `String#prepend` with self-referencing arguments
- [#6781](https://github.com/mruby/mruby/pull/6781) Protect `sprintf` format string from mutation during callbacks
- [#6783](https://github.com/mruby/mruby/pull/6783) Pin GitHub Actions workflows to commit hashes

# Security Fixes

Expand All @@ -359,4 +362,6 @@ Other optimizations:
- Integer overflow in Integer#lcm ([070bef24](https://github.com/mruby/mruby/commit/070bef24))
- Heap buffer overflow in `#method_missing` ([550d10a](https://github.com/mruby/mruby/commit/550d10a))
- Out-of-bounds read and divide-by-zero in `Array#product` ([8441eaf](https://github.com/mruby/mruby/commit/8441eaf))
- Heap buffer overflow in `String#prepend` with self-referencing arguments ([18ba026](https://github.com/mruby/mruby/commit/18ba026))
- Use-after-free in `sprintf` via `to_s` callback mutating format string ([48fc422](https://github.com/mruby/mruby/commit/48fc422))
- Multiple memory leak fixes in bigint, Set, Array, and Task gems
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