CVE-2025-32784 conda-forge-webservices has an Unauthorized Artifact Modification Race Condition
Attackers with staging access can exploit a race condition to replace validated artifacts with malicious ones, leading to unauthorized code execution in production.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-32784?
CVE-2025-32784 is a high-severity vulnerability in conda-forge-webservices, published on 15 Apr 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-367
Which versions are affected by CVE-2025-32784?
How do I fix CVE-2025-32784?
No fix has been published for CVE-2025-32784 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-32784 being exploited?
There is no known exploitation of CVE-2025-32784 in the wild and no public exploit code.
Sources
Also known as GHSA-28cx-74fp-g2g2.