CVE-2026-119602
Low
Description
libmspack through 0.11alpha contains an uninitialized memory disclosure vulnerability in the MS-ZIP decompressor that allows attackers to leak heap data via unchecked back-reference distances. Attackers can supply a crafted MS-ZIP CAB file whose first block begins with a back-reference, causing cabd->extract() to write up to 32 KiB of stale heap memory into extracted output.
SeverityLow
CVSS3.7
Exploit probability—
ProductKyz Libmspack
PublishedOct 30, 2026
First seenNov 4, 2026
Weakness typeCWE-908CWE-908
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kyz libmspack | v ≤ 0.11alpha | — |
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