CVE-2025-32799

Conda-build Vulnerable to Path Traversal via Malicious Tar File

Conda-build contains commands and tools to build conda packages. Prior to version 25.4.0, the conda-build processing logic is vulnerable to path traversal (Tarslip) attacks due to improper sanitization of tar entry paths. Attackers can craft tar archives containing entries with directory traversal sequences to write files outside the intended extraction directory. This could lead to arbitrary file overwrites, privilege escalation, or code execution if sensitive locations are targeted. This issue has been patched in version 25.4.0.

Affected

conda · conda-build

CVSS v4.0 GITHUB

5.6 MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:P/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

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.33% chance of exploitation in the next 30 days, 71st percentile

Published

2025-06-16

Updated

2025-06-17

Proof-of-concept exploits (1)

• conda/conda-build/security/advisories/GHSA-h499-pxgj-qh5h

Security advisories

• conda/conda-build/commit/bdf5e0022cec9a0c1378cca3f2dc8c92b4834673

References

• CVE Record
• NVD entry