7-Zip ZS 26.01 - v1.5.7 - Release 1

Security updates:

• GHSL-2026-135, Use-after-free in Lizard/LZ4/LZ5 (@JarLob)
• GHSL-2026-136, Stack buffer overflow in Lizard Huffman weight decoder (@JarLob)
• GHSL-2026-137, Heap OOB read in SetDecoderProperties2 via undersized codec properties buffer (@JarLob)
• GHSL-2026-138, Heap OOB read in SquashFS LZ4 decompressor (@JarLob)
• GHSL-2026-139, Heap OOB read in pt_decompress (@JarLob)

Compression versions in this release:

• Brotli Version 1.2.0
• Fast LZMA2 1.0.1
• Lizard Version 2.1
• LZ4 Version 1.10
• LZ5 Version 1.5
• Zstandard Version 1.5.7

Non-darkmode binaries (with -ndm suffix) are provided to support 5.0 subsystem (Windows 7), see gh-440.

What's Changed

• Fix issue with tree views in classic mode using wrong style by @ozone10 in #453
• GHA-CI: ARM runner for windows, flow optimization and deduplication by @sebres in #455
• Revert zst icon to modern one by @adem4ik in #457
• Fix the build of Clang 21.1.8. by @peashooter2 in #460
• Update: merged mainline v.26.00 by @sebres in #468
• Add zstd decompression support for NSIS archives by @hshakula in #475
• update CI: node.js 24, windows 2025 with vs2026 by @sebres in #489
• Merge 7-Zip 26.01 sources into 7-Zip-zstd by @boumenot in #491
• Update darkmodelib to 0.64.0 by @ozone10 in #502

New Contributors

• @adem4ik made their first contribution in #457
• @peashooter2 made their first contribution in #460
• @hshakula made their first contribution in #475
• @boumenot made their first contribution in #491

Full Changelog: v25.01-v1.5.7-R4...v26.01-v1.5.7-R1

7-Zip ZS 25.01 - v1.5.7 - Release 4

Updates and Fixes:

• add Linux support and generate linux binaries for ARM and x86 platforms
• adjust testings to run on Linux and Windows (@sebres @mcmilk)
• fixed a lot compiler warnings for clang/gcc
• fix darkmode support and crashes on older Windows OS (@sebres @ozone10)
• use linux for benchmarking now and add new results to README
• add current version of Yann's xxh* hashes, we have now: XXH32, XXH64, XXH3-64 and XXH3-128
• add brotli stream detection
• remove md5/sha3/sha512 extra code from C/hashes
• remove duplicate xxhash code in lizard, lz4, lz5, zstd
• remove Total Commander plugin and update README.md

Compression versions in this release:

• Brotli Version 1.2.0
• Fast LZMA2 1.0.1
• Lizard Version 2.1
• LZ4 Version 1.10
• LZ5 Version 1.5
• Zstandard Version 1.5.7

Non-darkmode binaries (with -ndm suffix) are provided to support 5.0 subsystem (Windows 7), see gh-440.

7-Zip ZS 25.01 - v1.5.7 - Release 3

Updates and Fixes:

• added non-darkmode binaries (with -ndm suffix) and old windows subsystem by @sebres
• fixed crash on Windows 7 by @ozone10 (#441)

Compression versions in this release:

• Brotli Version 1.2.0
• Fast LZMA2 1.0.1
• Lizard Version 2.1
• LZ4 Version 1.10
• LZ5 Version 1.5
• Zstandard Version 1.5.7

7-Zip ZS 25.01 - v1.5.7 - Release 2

Updates and Fixes:

• update Lizard to 2.1 by @sebres
• update LZ4 to 1.10 by @sebres
• some deduplications by @sebres
• update level mask for 7z, xz, zstd and lizard by @A2uria
• avoid array out-of-bounds access for g_Levels by @A2uria
• store/load last used properties of methods for 7z or zip types in/from registry per compression method by @sebres
• UI: implemented selection of ultra-fast compression levels for zstd by @sebres
• UI: enlarge compression levels combobox by @sebres
• UI: switch compression method and level comboboxes by @sebres
• update brotli to v.1.2.0 by @sebres
• fix inconsistent compression levels with mainline by @sebres
• Darkmode support by @ozone10

Compression versions in this release:

• Brotli Version 1.2.0
• Fast LZMA2 1.0.1
• Lizard Version 2.1
• LZ4 Version 1.10
• LZ5 Version 1.5
• Zstandard Version 1.5.7

7-Zip ZS 25.01 - v1.5.7 - Release 1

Updates and Fixes:

• update 7-Zip 25.01 - by @sebres

Compression versions in this release:

• Brotli Version 1.1.0
• Fast LZMA2 1.0.1
• Lizard Version 1.0
• LZ4 Version 1.9.4
• LZ5 Version 1.5
• Zstandard Version 1.5.7

7-Zip ZS 24.09 - v1.5.7 - Release 1

Updates and Fixes:

• update Zstandard to 1.5.7 - by @sebres
• fixed #387, #388, #391, #392, #394, #395

Compression versions in this release:

• Brotli Version 1.0.9
• Fast LZMA2 1.0.1
• Lizard Version 1.0
• LZ4 Version 1.9.4
• LZ5 Version 1.5
• Zstandard Version 1.5.7

7-Zip ZS 24.09 - v1.5.6 - Release 1

• update 7-Zip source code to v24.09 - by @sebres
• fixed hashing variants, some are in Igors 7-Zip Standard version now - by @sebres
• update Zstandard to 1.5.6 - by @NagaseIori

Compression versions in this release:

• Brotli Version 1.0.9
• Fast LZMA2 1.0.1
• Lizard Version 1.0
• LZ4 Version 1.9.4
• LZ5 Version 1.5
• Zstandard Version 1.5.6

7-Zip ZS 22.01 - v1.5.5 - Release 3

• update command line parsing to be more secure - thanks @sebres
• add SHA3 hashing
• use .zst as default extension for Zstandard files
• understand also .tzst and .tzstd files (tar archives compressed via zstd)

Compression versions in this release:

• Brotli Version 1.0.9
• Fast LZMA2 1.0.1
• Lizard Version 1.0
• LZ4 Version 1.9.4
• LZ5 Version 1.5
• Zstandard Version 1.5.5

7-Zip ZS 22.01 - v1.5.5 - Release 2

• update Zstandard to version 1.5.5
• revert the cmdline parsing patch for now - will be added later

Compression versions in this release:

• Brotli Version 1.0.9
• Fast LZMA2 1.0.1
• Lizard Version 1.0
• LZ4 Version 1.9.4
• LZ5 Version 1.5
• Zstandard Version 1.5.5

7-Zip ZS 22.01 - v1.5.5 - Release 1

• update Zstandard to version 1.5.5

Compression versions in this release:

• Brotli Version 1.0.9
• Fast LZMA2 1.0.1
• Lizard Version 1.0
• LZ4 Version 1.9.4
• LZ5 Version 1.5
• Zstandard Version 1.5.5