CVE-2026-46699 conda-forge CVE debrief

Who should care

Users of conda-smithy, especially those using versions prior to 3.61.0, should be aware of this vulnerability as it allows unintended write access to feedstock repositories through GitHub username takeover. Affected operators, platform administrators, vulnerability management teams, and security teams should review the official advisory and take necessary precautions to prevent exploitation.

Technical summary

A vulnerability in conda-smithy, prior to version 3.61.0, allowed unintended write access to feedstock repositories through GitHub username takeover. The root cause is the use of mutable GitHub usernames as identifiers for repository invitation routing, rather than stable, immutable GitHub user IDs. Version 3.61.0 fixes the issue by implementing stable, immutable GitHub user IDs for repository invitation routing, thereby preventing unintended write access to feedstock repositories.

Defensive priority

High priority should be given to updating conda-smithy to version 3.61.0 or later to prevent unintended write access to feedstock repositories. Additionally, reviewing and updating GitHub repository invitation routing and monitoring feedstock repositories for suspicious activity are recommended.

Recommended defensive actions

• Update conda-smithy to version 3.61.0 or later
• Review and update GitHub repository invitation routing to use stable, immutable GitHub user IDs
• Monitor feedstock repositories for any suspicious activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The vulnerability was reported through the conda-forge automated webservices and was addressed in version 3.61.0 of conda-smithy. The NVD entry for this CVE is currently Deferred. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected deployments and review official advisories for specific guidance.

Official resources