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    <lastBuildDate>Thu, 08 Oct 2026 01:07:42 +0000</lastBuildDate>
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      <title>CVE-2026-62239 — FlashAttention Symlink Attack via tarfile.extractall in hopper/setup.py</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-62239</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Dao-AILab flash-attention&lt;/p&gt;
&lt;p&gt;FlashAttention through 2.8.3.post1, fixed in commit 0816ef1, contains a symlink attack vulnerability in the download_and_copy() function within hopper/setup.py that extracts NVIDIA toolchain archives without validating symlinks or filtering tar members. A local attacker can pre-plant a symlink in the predictable cache directory to redirect extracted binaries to an attacker-chosen location, enabling arbitrary file write with victim privileges during build time.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Dao-AILab flash-attention&lt;/p&gt;
&lt;p&gt;FlashAttention through 2.8.3.post1, fixed in commit 0816ef1, contains a symlink attack vulnerability in the download_and_copy() function within hopper/setup.py that extracts NVIDIA toolchain archives without validating symlinks or filtering tar members. A local attacker can pre-plant a symlink in the predictable cache directory to redirect extracted binaries to an attacker-chosen location, enabling arbitrary file write with victim privileges during build time.&lt;/p&gt;</content:encoded>
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