MEDIUMCVSS v4 4.5Vulnerability
CVE-2026-121520
In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit control APIs can submit a build request that sets an extended attribute on a file outside the BuildKit state directory. Extended attributes in the trusted. or security. namespaces may also be set, potentially giving a program on the host elevated privileges. This issue affects build services that accept build requests from untrusted users. The issue is fixed in v0.34.1.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-11-04T01:29:06.847378+00:00
- Cvss score
- 4.5
- Cvss severity
- MEDIUM
- Retrieved at
- 2026-11-04T01:30:00+00:00
- Score
- 4.5
- Last source
- NVD
- Cvss version
- 4.0
- Cve id
- CVE-2026-121520
- Cvss vector
- CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- First seen by Signal
- 2026-11-04T01:30:00+00:00
- Name
- CVE-2026-121520
- Vector
- CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Published at
- 2026-11-03T23:17:34.177
- Last modified
- 2026-11-03T23:17:34.177
Related Entities (1)
HAS_WEAKNESS (1)
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