What is CVE-2026-46673?

CVE-2026-46673 is a high-severity vulnerability in Eugeny Russh, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-06-10.

How severe is CVE-2026-46673?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Eugeny Russh

CVE-2026-46673

Russh is a Rust SSH client & server library. Prior to version 0.60.3, CryptoVec used unchecked capacity growth, unchecked length arithmetic, and unsafe allocation/locking paths. In current russh releases, local SSH agent peers could still feed attacker-controlled frame lengths into buffer growth before validation. In older russh releases before 0.58.0, remote SSH traffic also reached CryptoVec through transport and compression buffers. This issue has been patched in version 0.60.3.

EPSS: 0.003 (18.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Eugeny Russh — versions < 0.60.3

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-46673?: CVE-2026-46673 is a high-severity vulnerability in Eugeny Russh, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-06-10.
How severe is CVE-2026-46673?: High severity. CVSS v3 base score is 7.5 out of 10.