AIKIDO-2026-713144
bcmls-jdk18on is vulnerable to Missing Authorization
85
High Risk
This Affects:
bcmls-jdk18onTL;DR
MLS external-commit validation lets a joiner remove an arbitrary existing member because the removed credential is not tied to the joiner. The fix requires the removed leaf credential to equal the external joiner's new-leaf credential on both the send and receive paths.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your MLS group accepts external commits from parties that possess the group's public GroupInfo.
Background info
bcmls-jdk18on is vulnerable to Missing Authorization in versions 1.78 - 1.85.
How to fix this
Upgrade the bcmls-jdk18on library to the patch version.
Are You Affected?
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