High [CVE-2026-56876] Arbitrary file write and information disclosure via symlink validation bypass
This high-severity Red Hat Linux advisory covers CVE-2026-56876.
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Summary
Arbitrary file write and information disclosure via symlink validation bypass. Red Hat rates this important (CVSS 8.1).
Weakness: CWE-22.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- No patch is available for extract-zip. The upstream maintainer is unresponsive (last commit 4+ years ago), and no fix is expected. Users should avoid using this package to extract untrusted ZIP archives. As a workaround, validate symlink targets manually before extraction, use an alternative library such as adm-zip or yauzl with proper path validation, or run extraction in a sandboxed environment (container, isolated filesystem).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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