Classic builder cache poisoning
Published Feb 1, 2024 · Updated Oct 23, 2026 · Also known as GHSA-xw73-rw38-6vjc, GO-2024-2512
Original summary
Normalized public record · Updated Oct 23, 2026
Classic builder cache poisoning
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
The classic builder cache system is prone to cache poisoning if the image is built `FROM scratch`. Also, changes to some instructions (most important being `HEALTHCHECK` and `ONBUILD`) would not cause a cache miss.
Potential impact
23.0+ users are only affected if they explicitly opted out of Buildkit (DOCKERBUILDKIT=0 environment variable) or are using the /build API endpoint (which uses the classic builder by default). All users on versions older than 23.0 could be impacted. An example could be a CI with a shared cache, or just a regular Docker user pulling a malicious image due to misspelling/typosquatting. Image build API endpoint (/build) and ImageBuild function from github.com/docker/docker/client is also affected as it the uses classic builder by default.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- GHSA-xw73-rw38-6vjc, GO-2024-2512
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Feb 1, 2024 · Last refreshed Oct 23, 2026