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CVE-2026-53956 is a path traversal vulnerability in rattler_cache and py-rattler. The flaw allows package contents obtained from a malicious or otherwise untrusted conda channel to be written outside the configured package cache directory by using a crafted conda package build string containing path separators or traversal sequences. During package cache materialization, insufficient neutralization of path elements in package metadata can cause the resulting filesystem write operations to escape the intended cache boundary.
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Cross-references every affected SKU, including bundled OEM variants.
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