VULNERABILITY INTELLIGENCE
CVE-2026-62239
CVSS score6.6 MEDIUM
EPSS probability0.16%
CISA KEVNot currently listed
Published2026-07-13
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Description
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.
Weakness classification
- disclosure@vulncheck.com: CWE-59