CVE-2026-104086

7-Zip before 26.03 contains an uninitialized memory disclosure vulnerability in the SquashFS v4 archive handler SquashfsHandler.cpp that allows attackers to leak heap memory by crafting a malicious archive where the superblock’s noids field is set so that the final metadata block’s expected size ...

CVE-2026-104086 7-Zip < 26.03 SquashFS Uninitialized Memory Disclosure via UID/GID Table

7-Zip before 26.03 contains an uninitialized memory disclosure vulnerability in the SquashFS v4 archive handler SquashfsHandler.cpp that allows attackers to leak heap memory by crafting a malicious archive where the superblock’s noids field is set so that the final metadata block’s expected size ...

CVE-2026-104086

7-Zip versions prior to 26.03 are vulnerable to an uninitialized memory disclosure vulnerability within the SquashFS v4 archive handler (specifically in SquashfsHandler.cpp). An attacker can craft a malicious archive where the superblock’s no_ids field causes a miscomputation of the final metadat...