CVE-2026-46690 — MEDIUM (5.8)

Q: How severe is CVE-2026-46690?

CVE-2026-46690 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-46690?

Check the references section above for vendor advisories and patch information. Affected products include: Spearman Unbounded-Spsc.

Vulnerability 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.

CVSS Score

5.8

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

HIGH

Affected Products

Vendor	Product	Versions
Spearman	Unbounded-Spsc	<= 0.2.0

Related Weaknesses (CWE)

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

References

https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqExploitVendor Advisory
https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqExploitVendor Advisory

FAQ

What is CVE-2026-46690?

CVE-2026-46690 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 pu...

How severe is CVE-2026-46690?

CVE-2026-46690 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-46690?

Check the references section above for vendor advisories and patch information. Affected products include: Spearman Unbounded-Spsc.