AIKIDO-2026-310773
sbt is vulnerable to Improper Authorization
98
Critical Risk
This Affects:
sbtTL;DR
The sbt build server exposes Language Server-style JSON-RPC methods such as sbt/exec over its network channel. When the server is configured with serverConnectionType set to Tcp, the sbt/exec handler queues and evaluates the supplied command line without first requiring the token-authenticated initialize handshake. A client able to reach the server socket can submit an arbitrary sbt command line and force the build to evaluate it, achieving remote code execution without knowing the authentication token. The fix gates the language-server methods behind the authentication check so unauthenticated requests are rejected.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you configure the sbt server with serverConnectionType set to Tcp.
Background info
sbt is vulnerable to Improper Authorization in versions 1.1.0 - 1.12.14 and 2.0.0 - 2.0.5.
How to fix this
Upgrade the org.scala-sbt:sbt library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant