ALPINE-CVE-2018-18586 — Vulnetix

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ALPINE-CVE-2018-18586 PUBLISHED CVSS 5.300000190734863 MEDIUM

chmextract.c in the chmextract sample program, as distributed with libmspack before 0.8alpha, does not protect against absolute/relative pathnames in CHM files, leading to Directory Traversal. NOTE: the vendor disputes that this is a libmspack vulnerability, because chmextract.c was only intended as a source-code example, not a supported application

Risk Scores

CVSS v3.0

5.300000190734863

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Products

Vendor	Product	Versions
Alpine:v3.8	libmspack	0.5, 0.7.1, 0
Alpine:v3.9	libmspack	0, 0.5, 0.7.1
Alpine:v3.10	libmspack	0, 0.5, 0.7.1
Alpine:v3.11	libmspack	0, 0, 0.5
Alpine:v3.7	libmspack	0.7.1, 0, 0.5
Alpine:v3.6	libmspack	0, 0.5, 0.7.1

Timeline

Oct 23, 2018 CVE Published
Nov 19, 2025 CVE Updated
Apr 30, 2026 Distribution Patch

References

https://security.alpinelinux.org/vuln/CVE-2018-18586 advisory

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