{"id":"CVE-2026-119602","aliases":[],"cve":{"records":[{"id":"CVE-2026-119602","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-30T11:46:47.302Z","published":"2026-10-30T13:18:20.547Z","modified":"2026-10-30T15:53:29.159Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-30T13:18:20.547Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T15:53:29.159Z"}],"references":[{"url":"https://github.com/kyz/libmspack/issues/60","tags":["issue-tracking"],"source":"VulnCheck"},{"url":"https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/mszipd.c#L264-L276","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://hackmd.io/@haindpwn/libmspack-mszip-uninit-window-info-leak","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/kyz/libmspack","tags":["product"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-memory-disclosure-via-ms-zip-decompressor-window","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-908","description":"Use of Uninitialized Resource","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:libmspack_project:libmspack:*:*:*:*:*:*:*:*","versionEndIncluding":"0.11alpha"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T15:21:16.087677Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"libmspack through 0.11alpha Uninitialized Memory Disclosure via MS-ZIP Decompressor Window","titleSource":"VulnCheck","descriptionSource":"VulnCheck","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.","score":6.3,"severity":"medium","published":"2026-10-30T13:18:20.547Z","modified":"2026-10-30T15:53:29.159Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"kyz","name":"libmspack","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.11alpha","versionType":"custom"}],"defaultStatus":"unaffected","packageURL":"pkg:github/kyz/libmspack","cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-119602"}],"remediation":[],"references":["https://github.com/kyz/libmspack/issues/60","https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/mszipd.c#L264-L276","https://hackmd.io/@haindpwn/libmspack-mszip-uninit-window-info-leak","https://github.com/kyz/libmspack","https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-memory-disclosure-via-ms-zip-decompressor-window"],"sources":[{"name":"CVE","id":"CVE-2026-119602","modified":"2026-10-30T15:53:29.159Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-119602"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7}],"sourceAffected":[],"observedAt":"2026-10-30T15:58:43.204Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T13:40:31.661Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T15:10:39.793Z","attemptedAt":"2026-10-30T15:10:39.793Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T15:10:38.517Z","attemptedAt":"2026-10-30T15:10:38.517Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T15:10:39.390Z","attemptedAt":"2026-10-30T15:10:39.390Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T15:10:38.548Z","attemptedAt":"2026-10-30T15:10:38.548Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-113939","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-113939","modified":"Oct 30, 2026, 1:18:20 PM","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","checkedAt":"2026-10-30T15:10:39.390Z"},{"source":"NVD","id":"CVE-2026-119602","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119602","modified":"2026-10-30T14:16:48.850","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-10-30T15:10:39.793Z"},{"source":"NVD","id":"CVE-2026-119602","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119602","modified":"2026-10-30T14:16:48.850","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","checkedAt":"2026-10-30T15:10:39.793Z"}],"aiSummary":{"text":"libmspack through 0.11alpha has an uninitialized memory disclosure vulnerability in the MS-ZIP decompressor, allowing attackers to leak heap data via crafted MS-ZIP CAB files. Attackers need to supply a specially crafted file to exploit this weakness. The impact is the disclosure of stale heap memory.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T15:01:29.408Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-119602"}]}}