CVE-2026-46699: CWE-284: Improper Access Control in conda-forge conda-smithy
conda-smithy is a tool for combining a conda recipe with configurations to build using freely hosted CI services into a single repository. Prior to version 3.61.0, a vulnerability in the conda-forge automated webservices 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.
AI Analysis
Technical Summary
CVE-2026-46699 describes an improper access control vulnerability (CWE-284) in conda-smithy, a tool used by conda-forge to combine conda recipes with CI configurations. Before version 3.61.0, the system relied on mutable GitHub usernames to route repository invitations, which allowed attackers who took over GitHub usernames to gain unintended write access to feedstock repositories. This vulnerability was addressed by switching to stable, immutable GitHub user IDs for invitation routing in version 3.61.0.
Potential Impact
The vulnerability allows an attacker who can take over a GitHub username to gain write access to conda-forge feedstock repositories, potentially leading to unauthorized code changes. The CVSS 3.1 base score is 7.6 (High), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, low confidentiality impact, high integrity impact, and low availability impact.
Mitigation Recommendations
Upgrade conda-smithy to version 3.61.0 or later, where the vulnerability is fixed by using immutable GitHub user IDs for repository invitation routing. No other mitigation or temporary fixes are documented. Patch status is not explicitly stated as 'official-fix' but the version 3.61.0 release addresses the issue.
CVE-2026-46699: CWE-284: Improper Access Control in conda-forge conda-smithy
Description
conda-smithy is a tool for combining a conda recipe with configurations to build using freely hosted CI services into a single repository. Prior to version 3.61.0, a vulnerability in the conda-forge automated webservices 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.
CVSS v3.1
Score 7.6high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-46699 describes an improper access control vulnerability (CWE-284) in conda-smithy, a tool used by conda-forge to combine conda recipes with CI configurations. Before version 3.61.0, the system relied on mutable GitHub usernames to route repository invitations, which allowed attackers who took over GitHub usernames to gain unintended write access to feedstock repositories. This vulnerability was addressed by switching to stable, immutable GitHub user IDs for invitation routing in version 3.61.0.
Potential Impact
The vulnerability allows an attacker who can take over a GitHub username to gain write access to conda-forge feedstock repositories, potentially leading to unauthorized code changes. The CVSS 3.1 base score is 7.6 (High), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, low confidentiality impact, high integrity impact, and low availability impact.
Mitigation Recommendations
Upgrade conda-smithy to version 3.61.0 or later, where the vulnerability is fixed by using immutable GitHub user IDs for repository invitation routing. No other mitigation or temporary fixes are documented. Patch status is not explicitly stated as 'official-fix' but the version 3.61.0 release addresses the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-15T23:26:58.308Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a346115f198dc38c1910c61
Added to database: 06/18/2026, 21:20:21 UTC
Last enriched: 06/26/2026, 13:13:55 UTC
Last updated: 08/02/2026, 19:17:59 UTC
Views: 105
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