CVE-2026-46690

unbounded_spsc is an "unbounded" extension of bounded_spsc_queue. In versions 0.2.0 and prior, sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race. At time of publication, there are no publicly available patches.

• CWE-125
• CWE-415
• CWE-704
• CWE-787

• https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6Exploit, Vendor Advisory
• https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6Exploit, Vendor Advisory

Published

Jun 12, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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