Medium severity · published Oct 5, 2026
CVE-2026-93317
Container blob cache can accept unverified content
5.9
CVSS
0.2%
EPSS
No
On KEV
Description
An unauthenticated attacker controlling a registry or OCI-layout blob source could provide blob contents that did not match the claimed digest. The resulting snapshot could be cached under that digest and reused by a later victim build, compromising build-input integrity.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BU
BuildKit · moby
0.28.0 before 0.33.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93317
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93317
vendor-advisory
https://github.com/moby/buildkit/security/advisories/GHSA-p3rc-w3hc-pqvv
patch
https://github.com/moby/buildkit/releases/tag/v0.33.1
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