How severe is CVE-2026-15793?

CVE-2026-15793 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-15793 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-15793?

CVE-2026-15793 affects Mobyproject Buildkit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-15793?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-15793 published?

CVE-2026-15793 was published on 2026-07-21 and last updated on 2026-07-30.

CVE-2026-15793

CVE-2026-15793 is a high-severity vulnerability in Mobyproject Buildkit with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-88.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.3
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-88
Affected product: Mobyproject Buildkit
Published: 2026-07-21
Last modified: 2026-07-30

Description

BuildKit custom frontends or clients using the raw low-level API can set git.checkoutbundle=true when checking out Git sources. If the Git source is malicious, this could lead to a crafted command invocation on the host.

Frequently asked questions

What is CVE-2026-15793?: BuildKit custom frontends or clients using the raw low-level API can set git.checkoutbundle=true when checking out Git sources. If the Git source is malicious, this could lead to a crafted command invocation on the host.
How severe is CVE-2026-15793?: CVE-2026-15793 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-15793 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-15793?: CVE-2026-15793 affects Mobyproject Buildkit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-15793?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-15793 published?: CVE-2026-15793 was published on 2026-07-21 and last updated on 2026-07-30.

References

https://github.com/moby/buildkit/security/advisories/GHSA-hw3h-2gp9-cxpv

Affected products (1)

cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*

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