CVE-2025-32784 Information

Description

conda-forge-webservices is the web app deployed to run conda-forge admin commands and linting. In versions prior to 2025.4.10 a race condition vulnerability has been identified in the conda-forge-webservices component used within the shared build infrastructure. This vulnerability categorized as a Time-of-Check to Time-of-Use (TOCTOU) issue can be exploited to introduce unauthorized modifications to build artifacts stored in the cf-staging Anaconda channel. Exploitation may result in the unauthorized publication of malicious artifacts to the production conda-forge channel. The core vulnerability results from the absence of atomicity between the hash validation and the artifact copy operation. This gap allows an attacker with access to the cf-staging token to overwrite the validated artifact with a malicious version immediately after hash verification but before the copy action is executed. As the cf-staging channel permits artifact overwrites such an operation can be carried out using the anaconda upload –force command. This vulnerability is fixed in 2025.4.10.

Reference

https://github.com/conda-forge/conda-forge-webservices/commit/141ed27617068debd150956341551df3a5a3807d https://github.com/conda-forge/conda-forge-webservices/security/advisories/GHSA-28cx-74fp-g2g2