CVE-2026-48104

7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain an uninitialized heap read in the SquashFS archive handler caused by a sparsely populated index array. In the SquashFS handler, blockToNode is allocated with capacity for every metadata block but populated...

EUVD-2026-34853

7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain an uninitialized heap read in the SquashFS archive handler caused by a sparsely populated index array. In the SquashFS handler, blockToNode is allocated with capacity for every metadata block but populated...

CVE-2026-48103 GHSL-2026-119 7-Zip WIM SecurityId OOB read

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM Windows Imaging archive handler's security descriptor lookup. In CHandler::GetSecurity CPP/7zip/Archive/Wim/WimHandler.cpp, the per-image SecurOffsets table...

EUVD-2026-34852

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM Windows Imaging archive handler's security descriptor lookup. In CHandler::GetSecurity CPP/7zip/Archive/Wim/WimHandler.cpp, the per-image SecurOffsets table...

CVE-2026-48103 GHSL-2026-119 7-Zip WIM SecurityId OOB read

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM Windows Imaging archive handler's security descriptor lookup. In CHandler::GetSecurity CPP/7zip/Archive/Wim/WimHandler.cpp, the per-image SecurOffsets table...

CVE-2026-48103

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM Windows Imaging archive handler's security descriptor lookup. In CHandler::GetSecurity CPP/7zip/Archive/Wim/WimHandler.cpp, the per-image SecurOffsets table...

CVE-2026-48103

7-Zip versions 9.34–26.00 contain an off-by-one heap out-of-bounds read in the WIM archive handler (WIM security descriptor lookup). In WimHandler.GetSecurity, the per-image SecurOffsets table holds numEntries+1 offsets, and securityId == numEntries is allowed, causing reads at SecurOffsets[secur...

CVE-2026-48103

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM Windows Imaging archive handler's security descriptor lookup. In CHandler::GetSecurity CPP/7zip/Archive/Wim/WimHandler.cpp, the per-image SecurOffsets table...

CVE-2026-48092

A flaw was found in 7-Zip, a file archiver. This vulnerability, affecting 32-bit builds, involves a heap memory disclosure caused by an integer overflow in the SquashFS ReadBlock function. An attacker can exploit this by providing a specially crafted archive, which, when processed, allows the...

CVE-2026-48095

A flaw was found in 7-Zip. A remote attacker could exploit a heap buffer overflow vulnerability in the application's handling of NTFS compressed streams. By crafting a malicious image and convincing a user to open it, the attacker can cause an under-allocation of a buffer, leading to an overwrite...

EUVD-2026-34850

7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse CPP/7zip/Archive/Udf/UdfIn.cpp, after validating size 38 + idLen + impLen and...

CVE-2026-48102 GHSL-2026-118: 7-Zip UDF Field OOB Read

7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse CPP/7zip/Archive/Udf/UdfIn.cpp, after validating size 38 + idLen + impLen and...

CVE-2026-48102

7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse CPP/7zip/Archive/Udf/UdfIn.cpp, after validating size 38 + idLen + impLen and...

CVE-2026-48102 GHSL-2026-118: 7-Zip UDF Field OOB Read

7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse CPP/7zip/Archive/Udf/UdfIn.cpp, after validating size 38 + idLen + impLen and...

CVE-2026-48102

7-Zip (versions 9.11–26.00) contains a heap out-of-bounds read in the UDF disc image handler (File Identifier Descriptor parser). In CFileId::Parse, after validating size and advancing to 38 + impLen + idLen, an alignment-padding loop reads up to 3 bytes past the end when (38 + impLen + idLen) % ...

CVE-2026-48102

7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse CPP/7zip/Archive/Udf/UdfIn.cpp, after validating size 38 + idLen + impLen and...

CVE-2026-48101 GHSL-2026-117: 7-Zip UEFI Capsule uninitialized heap memory disclosure

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule .scap parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize up to 1 GiB without...

CVE-2026-48101

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule .scap parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize up to 1 GiB without...

EUVD-2026-34849

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule .scap parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize up to 1 GiB without...

CVE-2026-48101

The CVE-2026-48101 entry concerns 7-Zip (versions 9.21–26.00) with an uninitialized heap memory disclosure in the UEFI capsule (.scap) parser. The OpenCapsule function allocates a heap buffer sized by attacker-supplied CapsuleImageSize (up to 1 GiB) without zero-initialization, then fills it via ...