| HISTORY of the 7-Zip | |
| -------------------- | |
| This file contains information about changes for latest versions of 7-Zip. | |
| The full changelog file can be downloaded here: | |
| https://7-zip.org/history.txt | |
| 26.01 2026-04-27 | |
| ------------------------- | |
| - linux version of 7-Zip can use huge pages (2 MB pages). It can increase compression | |
| speed for 10% for 7z/xz/LZMA/LZMA2 compression. | |
| - new -spo[d|c|r] switch specifies the path generation mode for the output directory | |
| for archive extraction. The output directory path is generated from the path specified | |
| in the -o{dir_path} switch and the name of the archive being unpacked. | |
| -spod : for Linux/Posix/macOS: -o{dir_path} specifies the direct path to the output directory. | |
| The asterisk (*) character in {dir_path} will not be replaced by the archive name. | |
| -spoc : 7-Zip will concatenate the path specified in -o{dir_path} with the archive name | |
| to form the final path to the output directory. | |
| -spor : 7-Zip will replace asterisk (*) character in the path specified in the -o{dir_path} | |
| with the archive name. This is the default option. | |
| - some bugs were fixed. | |
| 26.00 2026-02-12 | |
| ------------------------- | |
| - improved code for ZIP, CPIO, RAR, UFD, QCOW, Compound. | |
| - 7-Zip File Manager: improved sorting order of the file list. It uses file name as secondary sorting key. | |
| - 7-Zip File Manager: improved Benchmark to support systems with more than 64 CPU threads. | |
| - the bug was fixed: 7-Zip could not correctly extract TAR archives containing sparse files. | |
| - some bugs were fixed. | |
| 25.01 2025-08-03 | |
| ------------------------- | |
| - CVE-2025-55188 : The code for handling symbolic links has been changed | |
| to provide greater security when extracting files from archives. | |
| Command line switch -snld20 can be used to bypass default security | |
| checks when creating symbolic links. | |
| 25.00 2025-07-05 | |
| ------------------------- | |
| - 7-Zip for Windows can now use more than 64 CPU threads for compression | |
| to zip/7z/xz archives and for the 7-Zip benchmark. | |
| If there are more than one processor group in Windows (on systems with more than | |
| 64 cpu threads), 7-Zip distributes running CPU threads across different processor groups. | |
| - bzip2 compression speed was increased by 15-40%. | |
| - deflate (zip/gz) compression speed was increased by 1-3%. | |
| - improved support for zip, cpio and fat archives. | |
| - fixed some bugs. | |
| - CVE-2025-11001 and CVE-2025-11002 : A vulnerability was fixed for symbolic links processing, | |
| when extracting files from archives. | |
| - the bug was fixed : CVE-2025-53816 : 7-Zip could work incorrectly for some incorrect RAR archives. | |
| - the bug was fixed : CVE-2025-53817 : 7-Zip could crash for some incorrect COM (Compound File) archives. | |
| 24.09 2024-11-29 | |
| ------------------------- | |
| - The default dictionary size values for LZMA/LZMA2 compression methods were increased: | |
| dictionary size compression level | |
| v24.08 v24.09 v24.09 | |
| 32-bit 64-bit | |
| 8 MB 16 MB 16 MB -mx4 | |
| 16 MB 32 MB 32 MB -mx5 : Normal | |
| 32 MB 64 MB 64 MB -mx6 | |
| 32 MB 64 MB 128 MB -mx7 : Maximum | |
| 64 MB 64 MB 256 MB -mx8 | |
| 64 MB 64 MB 256 MB -mx9 : Ultra | |
| The default dictionary size values for 32-bit versions of LZMA/LZMA2 don't exceed 64 MB. | |
| - 7-Zip now can calculate the following hash checksums: SHA-512, SHA-384, SHA3-256 and MD5. | |
| - APM and HFS support was improved. | |
| - If an archive update operation uses a temporary archive folder and | |
| the archive is moved to the destination folder, 7-Zip shows the progress of moving | |
| the archive file, as this operation can take a long time if the archive is large. | |
| - The bug was fixed: 7-Zip File Manager didn't propagate Zone.Identifier stream | |
| for extracted files from nested archives (if there is open archive inside another open archive). | |
| - Some bugs were fixed. | |
| 24.08 2024-08-11 | |
| ------------------------- | |
| - The bug in 7-Zip 24.00-24.07 was fixed: | |
| For creating a zip archive: 7-Zip could write extra zero bytes after the end of the archive, | |
| if a file included to archive cannot be compressed to a size smaller than original. | |
| The created zip archive is correct except for the useless zero bytes after the end of the archive. | |
| When unpacking such a zip archive, 7-Zip displays a warning: | |
| "WARNING: There are data after the end of archive". | |
| - The bug was fixed: there was a leak of GDI objects (internal resources in Windows) | |
| in "Confirm File Replace" window, causing problems after 1600 displays of "Confirm File Replace" | |
| window from same running 7-Zip process. | |
| - Some optimizations for displaying file icons in 7-Zip File Manager and in "Confirm File Replace" window. | |
| - Some bugs were fixed. CVE-2024-11612. | |
| 24.07 2024-06-19 | |
| ------------------------- | |
| - The bug was fixed: 7-Zip could crash for some incorrect ZSTD archives (CVE-2024-11477). | |
| 24.06 2024-05-26 | |
| ------------------------- | |
| - The bug was fixed: 7-Zip could not unpack some ZSTD archives. | |
| 24.05 2024-05-14 | |
| ------------------------- | |
| - New switch -myv={MMNN} to set decoder compatibility version for 7z archive creating. | |
| {MMNN} is 4-digit number that represents the version of 7-Zip without a dot. | |
| If -myv={MMNN} switch is specified, 7-Zip will only use compression methods that can | |
| be decoded by the specified version {MMNN} of 7-Zip and newer versions. | |
| If -myv={MMNN} switch is not specified, -myv=2300 is used, and 7-Zip will only | |
| use compression methods that can be decoded by 7-Zip 23.00 and newer versions. | |
| - New switch -myfa={FilterID} to allow 7-Zip to use the specified filter method for 7z archive creating. | |
| - New switch -myfd={FilterID} to disallow 7-Zip to use the specified filter method for 7z archive creating. | |
| - Some bugs were fixed. | |
| 24.04 2024-04-05 | |
| ------------------------- | |
| - New menu item in 7-Zip File Manager: "Tools / Delete Temporary Files...". | |
| This menu item opens a window showing temporary folders and files | |
| created by 7-Zip in the user's "Temp" folder on a Windows system. | |
| In this window, the user can delete temporary files. | |
| 24.03 2024-03-23 | |
| ------------------------- | |
| - 7-Zip now can use new RISCV filter for compression to 7z and xz archives. | |
| RISCV filter can increase compression ratio for data containing executable | |
| files compiled for RISC-V architecture. | |
| - The speed for LZMA and LZMA2 decompression in ARM64 version for Windows | |
| was increased by 20%-60%. | |
| - 7-Zip GUI and 7-Zip File Manager can ask user permission to unpack RAR archives that | |
| require big amount of memory, if the dictionary size in RAR archive is larger than 4 GB. | |
| - new switch -smemx{size}g : to set allowed memory usage limit for RAR archive unpacking. | |
| RAR archives can use dictionary up 64 GB. Default allowed limit for RAR unpacking is 4 GB. | |
| - 7zg.exe (7-Zip GUI): -y switch disables user requests and messages. | |
| - 7-Zip shows hash methods XXH64 and BLAKE2sp in context menu. | |
| - -slmu switch : to show timestamps as UTC instead of LOCAL TIME. | |
| - -slsl switch : in console 7-Zip for Windows : to show file paths with | |
| linux path separator slash '/' instead of backslash separator '\'. | |
| - 7-Zip supports .sha256 files that use backslash path separator '\'. | |
| - Some bugs were fixed. | |
| 24.01 2024-01-31 | |
| ------------------------- | |
| - 7-Zip now can unpack ZSTD archives (.zst filename extension). | |
| - 7-Zip now can unpack ZIP, SquashFS and RPM archives that use ZSTD compression method. | |
| - 7-Zip now supports fast hash algorithm XXH64 that is used in ZSTD. | |
| - 7-Zip now can unpack RAR archives (that use larger than 4 GB dictionary) created by new WinRAR 7.00. | |
| - 7-Zip now can unpack DMG archives that use XZ (ULMO/LZMA) compression method. | |
| - 7-Zip now can unpack NTFS images with cluster size larger than 64 KB. | |
| - 7-Zip now can unpack MBR and GPT images with 4 KB sectors. | |
| - Speed optimizations for archive unpacking: rar, cab, wim, zip, gz. | |
| - Speed optimizations for hash caclulation: CRC-32, CRC-64, BLAKE2sp. | |
| - The bug was fixed: 7-Zip for Linux could fail for multivolume creation in some cases. | |
| - Some bugs were fixed. | |
| 23.01 2023-06-20 | |
| ------------------------- | |
| - The page "Language" in 7-Zip's menu Tools/Options now shows information | |
| about selected translation, including the number of translated lines. | |
| - Some bugs were fixed. | |
| 23.00 2023-05-07 | |
| ------------------------- | |
| - 7-Zip now can use new ARM64 filter for compression to 7z and xz archives. | |
| ARM64 filter can increase compression ratio for data containing executable | |
| files compiled for ARM64 (AArch64) architecture. | |
| Also 7-Zip now parses executable files (that have exe and dll filename extensions) | |
| before compressing, and it selects appropriate filter for each parsed file: | |
| - BCJ or BCJ2 filter for x86 executable files, | |
| - ARM64 filter for ARM64 executable files. | |
| Previous versions by default used x86 filter BCJ or BCJ2 for all exe/dll files. | |
| - Default section size for BCJ2 filter was changed from 64 MiB to 240 MiB. | |
| It can increase compression ratio for executable files larger than 64 MiB. | |
| - UDF: support was improved. | |
| - cpio: support for hard links. | |
| - Some changes and optimizations in WIM creation code. | |
| - When new 7-Zip creates multivolume archive, 7-Zip keeps in open state | |
| only volumes that still can be changed. Previous versions kept all volumes | |
| in open state until the end of the archive creation. | |
| - 7-Zip for Linux and macOS now can reduce the number of simultaneously open files, | |
| when 7-Zip opens, extracts or creates multivolume archive. It allows to avoid | |
| the failures for cases with big number of volumes, bacause there is a limitation | |
| for number of open files allowed for a single program in Linux and macOS. | |
| - There are optimizations in code for 7-Zip's context menu in Explorer: | |
| the speed of preparing of the menu showing was improved for cases when big number of | |
| files were selected by external program for context menu that contains 7-Zip menu commands. | |
| - There are changes in code for the drag-and-drop operations to and from 7-Zip File Manager. | |
| And the drag-and-drop operation with right button of mouse now is supported for some cases. | |
| - The bugs were fixed: | |
| - ZIP archives: if multithreaded zip compression was performed with more than one | |
| file to stdout stream (-so switch), 7-Zip didn't write "data descriptor" for some files. | |
| - ext4 archives: 7-Zip couldn't correctly extract symbolic link to directory from ext4 archives. | |
| - HFS and APFS archives: 7-Zip incorrectly decoded uncompressed blocks (64 KiB) in compressed forks. | |
| - HFS : zlib without Adler supported | |
| - Some another bugs were fixed. | |
| == | |
| End of document | |