Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
spearman unbounded-spsc — unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U L L H 5.8 .0013 3.1 —
AFFECTED
Product Versions Fixed
unbounded-spsc <= 0.2.0 – —
TIMELINE
May 15 Reserved by GitHub_M
Jun 12 EXPLOIT PUBLISHED — CVE-2026-46690 (spearman unbounded-spsc). Public exploit reference added.
Jun 12 Published (CNA: GitHub_M)
Description
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| May 15, 2026 | Reserved | Reserved by GitHub_M |
| June 12, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-46690 (spearman unbounded-spsc). Public exploit reference added. |
| June 12, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| spearman | unbounded-spsc | — | <= 0.2.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-46690 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.