Is there a public exploit for CVE-2026-121522?

No public exploit for CVE-2026-121522 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-121522?

CVE-2026-121522 scores CVSS 6.7 (v4.0), rated medium.

What does CVE-2026-121522 affect?

CVE-2026-121522 affects moby buildkit.

6.7 Medium

In BuildKit versions v0.26.0 through v0.34.1, a specific build definition that resolves metadata for the same Git source reference twice…

CVE-2026-121522

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.

Assessment

CVSS: 6.7 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 3 November 2026
Last updated: 3 November 2026
Affected: moby · buildkit
Assigner: Docker

CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

https://github.com/moby/buildkit/security/advisories/GHSA-2fqp-xg6f-v7gj

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