Affected versions of this crate implements Send for Decoder for any R: Read. This allows Decoder to contain R: !Send and carry (move) it to another thread.
This can result in undefined behavior such as memory corruption from data race on R, or dropping R = MutexGuard from a thread that didn't lock the mutex.
The flaw was corrected in commit a34d6e1 by adding trait bound R: Send to the Send impl for Decoder.
// cvss v3.1 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Checked 2026-09-28 at 19:46 UTC. The most recent advisory here was published 2021-08-25. Updated continuously from NVD, GHSA, OSV and CNA feeds.