Symlink Attack Affecting flash-attention package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-FLASHATTENTION-17971529
- published14 Jul 2026
- disclosed13 Jul 2026
- creditUnknown
Introduced: 13 Jul 2026
NewCVE-2026-62239 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
flash-attention is a Flash Attention2 operator on Huawei Ascend 910A.
Affected versions of this package are vulnerable to Symlink Attack via the download_and_copy function in hopper/setup.py when extracting archives without validating symlinks or filtering tar members. An attacker can achieve arbitrary file writes with the privileges of the victim by pre-placing a symlink in the cache directory and triggering extraction during build time.