CVE-2025-32800

CVE-2025-32800 is a critical-severity vulnerability in Anaconda Conda-build with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1357.

Key facts

Description

Conda-build contains commands and tools to build conda packages. Prior to version 25.3.0, the pyproject.toml lists conda-index as a Python dependency. This package is not published in PyPI. An attacker could claim this namespace and upload arbitrary (malicious) code to the package, and then exploit pip install commands by injecting the malicious dependency in the solve. This issue has been fixed in version 25.3.0. A workaround involves using --no-deps for pip install-ing the project from the repository.

Frequently asked questions

What is CVE-2025-32800?
Conda-build contains commands and tools to build conda packages. Prior to version 25.3.0, the pyproject.toml lists conda-index as a Python dependency. This package is not published in PyPI. An attacker could claim this namespace and upload arbitrary (malicious) code to the package, and then exploit pip install commands by injecting the malicious dependency in the solve. This issue has been fixed in version 25.3.0. A workaround involves using --no-deps for pip install-ing the project from the repository.
How severe is CVE-2025-32800?
CVE-2025-32800 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-32800 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-32800?
CVE-2025-32800 affects Anaconda Conda-build. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-32800?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-32800 have an EU (EUVD) identifier?
Yes. CVE-2025-32800 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18458.
When was CVE-2025-32800 published?
CVE-2025-32800 was published on 2025-06-16 and last updated on 2026-06-17.

References

Affected products (1)

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