CVE-2026-102521: lib0 `readFromDataView` out-of-bounds read
The decoder in readFromDataView in lib0 before 0.2.119 can be tricked into reading more than it should from a buffer. The vulnerability allows reading past the decoders' view, thus exposing adjacent process memory. This can be anything that is currently in the head, for example credentials or logs. This is similar to but different from GHSA-r5c8-rf4w-qrq8.
Affected Software
Event History
Frequently Asked Questions
Which lib0 versions are affected?
Versions of lib0 before 0.2.119 are affected. Updating to 0.2.119 or later removes the affected version range.
Does exploitation require authentication or user interaction?
The supplied CVSS vector indicates network reachability, low attack complexity, no privileges required, and no user interaction. An exposed application that processes attacker-controlled decoder input is therefore the relevant exposure scenario.
What information could be exposed if the issue is exploited?
The out-of-bounds read can expose adjacent process memory beyond the decoder's view. The advisory notes that this may include data currently held in memory, such as credentials or logs.