CVE-2026-121522: medium-severity vulnerability in moby BuildKit
Possible panic from Git source resolver
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.7epss 0.1%
In BuildKit versions v0.26.0 through v0.34.1, a specific build definition that resolves metadata for the same Git source reference twice can cause the BuildKit daemon to panic and crash, interrupting builds handled by that daemon. The issue is fixed in v0.34.2.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
moby · BuildKitRelated CVEs — moby BuildKit
In the same product, most dangerous first.
CVE-2026-15788MEDIUMWCOW cache mount source selector resolves NTFS junctions outside of cache rootEPSS 0.4%CVE-2026-15789MEDIUMMalicious client can bypass destination directory validation on local sources uploadEPSS 0.3%CVE-2026-93326MEDIUMCrafted Git build source can bypass certain policy validationEPSS 0.2%CVE-2026-15791LOWLLB file operation can be tricked to remove /tmp directory contentsEPSS 0.2%CVE-2026-15792MEDIUMPossible panic when incorrect parameters sent from frontendEPSS 0.2%CVE-2026-93316HIGHStarting daemon with --cdi-disabled flag can lead to panic on specific buildsEPSS 0.2%