{"id":"CVE-2026-119602","published":"2026-10-30T14:16:48.700","lastModified":"2026-10-30T16:17:49.240","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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-908"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kyz/libmspack","tags":[]},{"url":"https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/mszipd.c#L264-L276","tags":[]},{"url":"https://github.com/kyz/libmspack/issues/60","tags":[]},{"url":"https://hackmd.io/@haindpwn/libmspack-mszip-uninit-window-info-leak","tags":[]},{"url":"https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-memory-disclosure-via-ms-zip-decompressor-window","tags":[]}],"exploitRefs":[{"url":"https://github.com/kyz/libmspack","tags":[]},{"url":"https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/mszipd.c#L264-L276","tags":[]},{"url":"https://github.com/kyz/libmspack/issues/60","tags":[]}],"hasPoc":true,"ai":null}