CVE-2026-46690

MEDIUMNVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2026-05-29. NVD baseline CVSS 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
5.8
EG Score
5.8(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity58% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.0%
KEV
Not listed

Published

May 29, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race · Advisory · spearman/unbounded-spsc · GitHub

https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6

Vendor Advisories for CVE-2026-46690(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
rustunbounded-spsc—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
unbounded-spsc———

Weakness Classification(4)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 03:17 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 17:03 UTCEPSS rescore
  8. 2026-07-16 01:50 UTCGHSA enrichment
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-14 13:58 UTCGHSA enrichment
  11. 2026-07-13 22:30 UTCEPSS rescore
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 17:26 UTCGHSA enrichment
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-09 19:10 UTCEPSS rescore
  16. 2026-07-08 17:18 UTCGHSA enrichment
  17. 2026-07-08 15:16 UTCEPSS rescore
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-02 04:25 UTCGHSA enrichment
  23. 2026-07-01 02:39 UTCGHSA enrichment
  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-30 00:54 UTCGHSA enrichment
Show 49 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-28 22:15 UTCGHSA enrichment
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-27 20:29 UTCGHSA enrichment
  8. 2026-06-27 03:08 UTCEPSS rescore
  9. 2026-06-26 18:46 UTCGHSA enrichment
  10. 2026-06-25 16:56 UTCGHSA enrichment
  11. 2026-06-25 13:49 UTCEPSS rescore
  12. 2026-06-24 15:12 UTCGHSA enrichment
  13. 2026-06-24 14:05 UTCEPSS rescore
  14. 2026-06-23 21:33 UTCEPSS rescore
  15. 2026-06-23 21:33 UTCEPSS rescore
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-21 14:56 UTCEPSS rescore
  19. 2026-06-21 14:56 UTCEPSS rescore
  20. 2026-06-21 01:59 UTCEPSS rescore
  21. 2026-06-21 01:59 UTCEPSS rescore
  22. 2026-06-19 19:26 UTCEPSS rescore
  23. 2026-06-19 19:26 UTCEPSS rescore
  24. 2026-06-18 17:52 UTCEPSS rescore
  25. 2026-06-18 17:52 UTCEPSS rescore
  26. 2026-06-18 04:23 UTCGHSA enrichment
  27. 2026-06-17 17:53 UTCEPSS rescore
  28. 2026-06-17 02:39 UTCGHSA enrichment
  29. 2026-06-16 17:53 UTCEPSS rescore
  30. 2026-06-16 00:56 UTCGHSA enrichment
  31. 2026-06-15 17:49 UTCEPSS rescore
  32. 2026-06-14 23:12 UTCGHSA enrichment
  33. 2026-06-13 23:00 UTCEPSS rescore
  34. 2026-06-13 21:29 UTCGHSA enrichment
  35. 2026-06-12 23:12 UTCEPSS rescore
  36. 2026-06-12 19:45 UTCGHSA enrichment
  37. 2026-06-11 18:01 UTCGHSA enrichment
  38. 2026-06-10 16:17 UTCGHSA enrichment
  39. 2026-06-09 14:34 UTCGHSA enrichment
  40. 2026-06-08 12:50 UTCGHSA enrichment
  41. 2026-06-07 11:07 UTCGHSA enrichment
  42. 2026-06-06 09:23 UTCGHSA enrichment
  43. 2026-06-05 07:39 UTCGHSA enrichment
  44. 2026-06-04 05:56 UTCGHSA enrichment
  45. 2026-06-03 04:11 UTCGHSA enrichment
  46. 2026-06-02 02:27 UTCGHSA enrichment
  47. 2026-06-01 00:43 UTCGHSA enrichment
  48. 2026-05-29 19:20 UTCEG score recompute
  49. 2026-05-29 19:20 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-46690?
CVE-2026-46690 is a medium vulnerability published on May 29, 2026. unboundedspsc is an "unbounded" extension of boundedspsc_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.
When was CVE-2026-46690 disclosed?
CVE-2026-46690 was first published in the National Vulnerability Database on May 29, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46690 actively exploited?
CVE-2026-46690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46690?
CVE-2026-46690 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-46690?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46690, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-46690

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