CVE-2026-6654: Mozilla Thin-Vec

Medium severity, CVSS 5.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate. A panic in `ptr::drop_in_place` skips setting the length to zero.

Affected products

• Mozilla Thin-Vec: version 0.2.15 only

Published 2026-04-20. Last modified 2026-07-15.