CVE-2026-105163: Time-of-check Time-of-use in crossplane crossplane-runtime
Description
CVE-2026-105163 is a time-of-check to time-of-use (TOCTOU) vulnerability in the crossplane-runtime component of Crossplane, specifically affecting the Get function in pkg/xpkg/client.go within the ImageConfig component. This vulnerability affects versions 2.2.0 through 2.2.2 and 2.3.0 through 2.3.2. The issue can be exploited remotely and has a CVSS 4.0 base score of 6.9, indicating medium severity. Upgrading to versions 2.2.3, 2.3.3, or 2.4.0-rc.1 resolves the issue.
CVSS v4.0
Score 6.9medium
Affected software
crossplane
crossplane-runtime
pkg:github/crossplane/crossplane-runtimecpe:2.3:a:crossplane:crossplane-runtime:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in crossplane-runtime up to versions 2.2.2 and 2.3.2 involves a time-of-check to time-of-use (TOCTOU) race condition in the Get function of the ImageConfig component (file pkg/xpkg/client.go). This flaw could allow an attacker to manipulate the state between the check and use phases, potentially leading to unexpected behavior or security issues. The vulnerability can be exploited remotely without privileges or user interaction. The issue is fixed in versions 2.2.3, 2.3.3, and 2.4.0-rc.1, with the patch identified by commit bee99c6cd6ca81878acca2940a2f0a02169fc208.
Potential Impact
An attacker can remotely exploit this TOCTOU vulnerability to manipulate the behavior of the ImageConfig component during the Get operation. While the exact impact beyond this manipulation is not detailed, the medium CVSS score reflects a moderate risk of unauthorized actions or system state inconsistencies caused by the race condition.
Mitigation Recommendations
Upgrade affected crossplane-runtime versions to 2.2.3, 2.3.3, or 2.4.0-rc.1 to remediate this vulnerability. The vendor has provided an official fix, and applying these updates is the recommended mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-10-04T07:28:17.729Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac2c9cd2cdf04f6565770f7
Added to database: 10/04/2026, 21:49:01 UTC
Last enriched: 10/04/2026, 22:03:13 UTC
Last updated: 10/04/2026, 22:08:10 UTC
Views: 2
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