Activity for 7-Zip
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mmortal03 modified a comment on discussion Open Discussion
It would be very helpful to have an additional option to set the "Working folder" to be: "destination (target) folder". Currently, I have to go in and manually set the "specified folder" to whichever drive I happen to be sending the large, compressed output file to. I generally don't want to compress the file to the system's temp directory, because the system drive isn't always large enough, and it is often an SSD. After compressing it, it then has to copy it over to wherever it's going. Similarly,...
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It would be very helpful to have an additional option to set the "Working folder" to be: "destination (target) folder". Currently, I have to go in and manually set the "specified folder" to whichever drive I happen to be sending the large, compressed output file to. I generally don't want to compress the file to the system's temp directory, because the system drive isn't always large enough, and it is often an SSD. After compressing it, it then has to copy it over to wherever it's going. Similarly,...
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It would be very helpful to have an additional option to set the "Working folder" to be: "destination (target) folder". Currently, I have to go in and manually set the "specified folder" to whichever drive I happen to be sending the large, compressed output file to. I generally don't want to compress the file to the system's temp directory, because the system drive isn't always large enough, and it is often an SSD. After compressing it, it then has to copy it over to wherever it's going. Whereas,...
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gaurav posted a comment on ticket #707
7-Zip Mark-of-the-Web Security Feature Bypass Vulnerability (CVE-2026-58052) . When can the fix or new update for 7-zip will be released.
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7-Zip Mark-of-the-Web Security Feature Bypass Vulnerability (CVE-2026-58052)
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Igor Pavlov posted a comment on discussion Help
https://7-zip.org/recover.html
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Miko G posted a comment on discussion Help
Hello, I have a damaged 7z archive of size 5,212,282,403 bytes created with 7-Zip (most probably 26.01) with no password. Archive was created in old PC (which is no longer available). Months later I copied the archives from the USB drive to a new PC. 7-Zip now reports Öpen Error: Cannot open the file as (7z) archives ERROR: Is not archive. SHA256 hash of the archive on the USB drive and copied version are identical. 7-Zip cannot list, test, or extract the archive DMDE raw scan found a second 7z object...
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Asta Nora posted a comment on discussion Open Discussion
It sounds like the issue may be related to how 7-Zip parses specific UDF 2.5 structures generated by XReveal or AnyDVD rather than corruption in the ISO itself. Since UltraISO appears to rewrite or normalize the image structure, that would explain why the file becomes readable afterward. I've encountered similar compatibility problems where one application handles a file format perfectly while another struggles with certain metadata or filesystem implementations. The same thing happens in the Android...
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Harry Stein posted a comment on ticket #2701
Hi Igor, Thank you for getting back to me so quickly. Your intuition about the USB bottleneck is spot on, and I was indeed operating under a severe hardware constraint. During the 7-Zip operation, I was simultaneously running a 97 GB ROBOCOPY from my internal SSD to the exact same USB 3.0 destination drive. I had to do this out of necessity due to limited free space on the host (SSD) C: drive (99.9% full), which also forced me to place the temp folder on the same USB 3.0 drive. Here are the system...
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Maybe your usb was slow for data writing by some reason. What is your usb drive and speed of that usb? Try to copy some big file to that usb. Maybe you will have similar problems write more information about issue: what archive type: zip or 7z? compression settings do you create new archive ot update previous version of archive? number of original files total size of original files archive size cpu ram size windows system
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user interface misleading
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AdamL posted a comment on ticket #2681
This is still unassigned and nobody is assigned to the associated issue on GitHub (https://github.com/ip7z/7zip/issues/233). Looking for an update please.
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Do you have virtual memory enabled in system? Note also that 7-zip can update archive. So 7-Zip uses more complex operation for some cases, where some data can be recompressed from previous copy of archive. It's better to remove old archive before creating new archive, if you don't need old data. Sometimes this message The System cannot allocate the required amount of memory" may appear as a result of unexpected program failures.
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mdadm posted a comment on discussion Open Discussion
All these two (CVE-2026-14266 and CVE-2026-58052) have been fixed in 7-Zip version 26.02 (current latest) according to, for example, these sites: https://www.openwall.com/lists/oss-security/2026/07/17/12 https://www.vulncheck.com/advisories/7-zip-mark-of-the-web-bypass-via-rar5-alternate-data-stream-name-collision I don't know why qualsys has flagged this (current?) version. Any details on that software (web or local soft), process (how procedure was done)?
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Thomas posted a comment on discussion Help
After a reboot (NOT: shutdown+cold start) 7zip works (with Dictionary size=2256MB) . Very strange. No, I didn't change anything for virtual memory
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Please change "Dictionary size" from 256 MB to 64 MB and try again. Did you change virtual memory settings in your Windows system?
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Please change "Dictionary size" from 256 MB to 64 MB and try again. Did you change virtial memory settings in your Windows system?
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Ok, here it is
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Please show the window with all selected options.
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I want to 7zip a large directory tree with a size of ~15GB and ~74000 files. When I start 64bit 7zip v26.02 on a 64bit Windows 10 system with 16GB RAM and 1,1 TB free space on SSD 7zip shows me an error popup: "The System cannot allocate the required amount of memory" Hmm, in the past I could successfully 7zip such directory trees with similar size. Whats wrong? I used: Archive format 7z Compression level: Ultra method: LZMA2 Directory size: 256 MB Word size 64 Solid Block Size: 4 GB Memory usage...
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Nigbir modified a comment on ticket #705
https://GitHub.com/Kingdomhearttop/pnx-archive
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Please add PNX archive
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Referencing OOB memory in LvmHandler.cpp
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Dmitry Glavatskikh posted a comment on ticket #704
I found another topic from 2024 that appears to be very close to my current experience. In other words, you’ve already read Igor’s reply to your question :-) So either rebind the *.7z file association to 7z-FM, or go blame Windows support for hijacking the opening of 7z archives with their substandard code, which doesn’t support encrypted archives.
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Tish posted a comment on discussion Open Discussion
Hey! I know it's not standard, but since 7z fork exists which brings in other compression methods via plugin system, I'd like to see just decompressing support in main 7z software. Would that be possible? zstd is the one that already has support, but only in ZIP archives. Could it be done, pretty please?
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Wlodzimierz O. Kubera posted a comment on discussion Open Discussion
Hello! Would you, please, add a feature to vcpkg? It would be good to have such application. Look at the vcpkg directxtex, please, as example. I comes with three optional tools P. S. In my case, I use the liblzma and the 7-zip app I also download separatelly. Greetings
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Jamie posted a comment on discussion Help
Hii I asked a companey for a Subject Rights Access, Basically its all the information the companey holds on me, They sent me the document zipped and told me the following When received, please extract the files. To do so, firstly download the archived document folder, right-click on the zip file and under the 7-zip heading click the select extract to... you will then be prompted for the password. I have done this many times I have entered the password correct each time when I then open the folder...
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Keith Schlesinger posted a comment on ticket #704
I found another topic from 2024 that appears to be very close to my current experience. See "Double Click doesn't open an encrypted 7-Zip archive" including my own post I just added
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I am currently experiencing the same symptoms in Windows 11 version 25H2. It did not happen until I did an in-place 25H2 upgrade to fix a number of corrupted system files that SFC and DISM commands could not repair or replace. Since the in-place upgrade, I must open 7-zip and navigate to the file with the internal file explorer. Then the encrypted file can be opened using the password I assigned. Just tapping on the .7z archive itself produces an error message every time. (See attachment)
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All 7-zip encrypted archives will not open by double-tapping archive name
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Chewie Wookiee posted a comment on discussion Open Discussion
I see requests for this go way back but I really think it is time this program gets an auto update feature or at least an update version notification. Escpecially with the latest news about the vulnerability. I hope the developer seriously considers this feature now to be added.
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Jack Bravo posted a comment on discussion Open Discussion
If Qualys is flagging 7-Zip 26.02, the best solution is to upgrade to the latest version as soon as a patched release is available. Until then, avoid opening XZ or RAR5 archives from untrusted sources, and consider temporarily blocking those file types in your environment. If an updated version has already been released, updating should resolve the vulnerability findings after rescanning.
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zanzara posted a comment on discussion Open Discussion
sadly no fix yet. has already been asked in another thread: https://sourceforge.net/p/sevenzip/discussion/45797/thread/13b85868d0/
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7-Zip recompressed old solid block after file removing. But new data will be added to new solid block.
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Robert Barcikowski posted a comment on discussion Open Discussion
7-Zip version 26.02 and prior versions are affected by a heap-based buffer overflow vulnerability (CVE-2026-14266) in XZ archive decompression and a Mark-of-the-Web (MotW) bypass flaw (CVE-2026-58052). An attacker can potentially achieve remote code execution if a user opens a maliciously crafted XZ or RAR5 archive.Vulnerability DetailsCVE-2026-14266: Heap-based buffer overflow in XZ chunked data handling with a CVSS score of 7.0; triggered when opening a fake compressed file.CVE-2026-58052: Mark-of-the-Web...
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qualsys has flagged this version as unsafe, is there a fix eta? 7-Zip version 26.02 and prior versions are affected by a heap-based buffer overflow vulnerability (CVE-2026-14266) in XZ archive decompression and a Mark-of-the-Web (MotW) bypass flaw (CVE-2026-58052). An attacker can potentially achieve remote code execution if a user opens a maliciously crafted XZ or RAR5 archive.Vulnerability DetailsCVE-2026-14266: Heap-based buffer overflow in XZ chunked data handling with a CVSS score of 7.0; triggered...
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7z stores files in "solid" groups for better compression. Directory entry is just metadata without data. So directory entries are stored outside of file groups.
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Zhai Can posted a comment on ticket #703
A copy from yazi's author as a reference, stating the idea - Yeah that's exactly why previewers (not just archive.lua), are designed to do as little data processing as possible. For performance, doing less may be better than using a smarter algorithm. My idea hasn't changed much: ask 7-Zip to add an option to 7z l: Non-mandatory: Prefer outputting the list sequentially rather than interleaved. Mandatory: Sort the list before outputting it. As you said, if 7z already outputs everything at once, it...
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'7z list' order
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Farahin Fauze posted a comment on ticket #2692
thank you for your explaination
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Arav posted a comment on ticket #2692
not fixed.. 7-Zip 26.02, is already the newest version vulnerability scanners separately flags CVE-2026-58052 in 7-Zip 26.02
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CVE-2026-58052 exists on 7-Zip (ver. 26.02.00.0) -"Action1’s vulnerability scanner separately flags CVE-2026-58052 because that vulnerability affects 7-Zip through version 26.02. There is currently no newer 7-Zip release in Action1’s catalogue to deploy." CVE-2026-58052 is a medium-severity security flaw in 7-Zip for Windows through version 26.02 that fails to preserve the Mark-of-the-Web (MotW). It lets attackers bypass Windows SmartScreen warnings and spoof file contents using crafted RAR5 arc...
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CVE-2026-58052 exists on 7-Zip (ver. 26.02.00.0) -"Action1’s vulnerability scanner separately flags CVE-2026-58052 because that vulnerability affects 7-Zip through version 26.02. There is currently no newer 7-Zip release in Action1’s catalogue to deploy."
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CVE-2026-58052 exists on 7-Zip (ver. 26.02.00.0) -Action1’s vulnerability scanner separately flags CVE-2026-58052 because that vulnerability affects 7-Zip through version 26.02. There is currently no newer 7-Zip release in Action1’s catalogue to deploy.
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can you tell me how to remediate this issues?
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estomagado posted a comment on ticket #2692
No, it won't. I can confirm that both Qualys and Tenable flag 26.02 as vulnerable. This is a different vulnerability, not the one that was fixed with 26.02.
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I can confirm that both Qualys and Tenable flag 26.02 as vulnerable.
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means, by upgrading to version 26.02 can fix this error?
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