Vulnerability · Published Jun 16, 2025 · Assigned by GitHub_M

CVE-2025-32799Conda-build Vulnerable to Path Traversal via Malicious Tar File

Medium 5.6

In plain English

A medium-severity path traversal in conda-build from conda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 4.0)5.6Medium

Exploit odds (30 days)1.3%top 28.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
conda	conda-build	< 25.4.0

Weakness: CWE-22 · Vector: CVSS: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

References

https://github.com/conda/conda-build/security/advisories/GHSA-h499-pxgj-qh5h x_refsource_CONFIRM
https://github.com/conda/conda-build/commit/bdf5e0022cec9a0c1378cca3f2dc8c92b4834673 x_refsource_MISC
https://github.com/conda/conda-build/blob/834448b995eee02cf1c2e7ca97bcfa9affc77ee5/conda_build/convert.py x_refsource_MISC
https://github.com/conda/conda-build/blob/834448b995eee02cf1c2e7ca97bcfa9affc77ee5/conda_build/render.py x_refsource_MISC