CVE-2026-46690

Name: CVE-2026-46690
Creator: NVD / NIST
Published: 2026-06-12T16:16:29.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.8/10EPSS 0.13%

Last modified Jun 17, 2026

CVE-2026-46690 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.8/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

EPSS Probability

0.13%

3.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Spearman	Unbounded-Spsc	<= 0.2.0

References

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

Timeline

Published: Jun 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-46690?

How severe is CVE-2026-46690?

CVE-2026-46690 has a CVSS score of 5.8/10 (MEDIUM severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.

How do I fix CVE-2026-46690?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-46690?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST