Dashboard / CVE-2026-62239

CVE-2026-62239

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 26/100
Published: 2026-07-13 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: Passive
S: X
AT: Present
VC: High
VI: High
VA: None

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 (1)

References & Advisories (4)

Bug Bounty Relevance

26 / 100
✓ Low complexity

CVSS Score

5.3 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.16%
Raw Score 0.001640
Percentile 5.6%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00164
2026-10-28
0.00164

Intelligence Sources

nvd ref →

External Links