Read the docs
TI-2026-34308 Aliases CVE-2026-46673GHSA-g9f8-wqj9-fjw5

Resource allocation without limits in Eugeny russh

Priority HIGH 72CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00263 18th percentileScored 2026-11-07
Fix Fixed russh (Eugeny): 0.60.3russh-cryptovec (crates.io): 0.60.3+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eugenyrusshbefore 0.60.30.60.3Patch availableCNA
—russh-cryptovec (crates.io)before 0.60.30.60.3Patch availableGHSA-g9f8-wqj9-fjw5
—russh (crates.io)before 0.60.30.60.3Patch availableGHSA-g9f8-wqj9-fjw5
  • russh VendorEugeny Affected before 0.60.3 Fixed in 0.60.3 Patch available CNA
  • russh-cryptovec (crates.io) Vendor— Affected before 0.60.3 Fixed in 0.60.3 Patch available GHSA-g9f8-wqj9-fjw5
  • russh (crates.io) Vendor— Affected before 0.60.3 Fixed in 0.60.3 Patch available GHSA-g9f8-wqj9-fjw5

Remediation

  • Fix · CNA russh (Eugeny) Fixed in 0.60.3
  • Fix · GHSA-g9f8-wqj9-fjw5 russh-cryptovec (crates.io) Fixed in 0.60.3 Advisory →
  • Fix · GHSA-g9f8-wqj9-fjw5 russh (crates.io) Fixed in 0.60.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46673
  2. 2026-10-03 Alias added: GHSA-g9f8-wqj9-fjw5

References

Advisory 1

Other 4

  • TI-2026-65512 russh: Client-side channel-scoped Handler callbacks fire for channel IDs the client never opened CVSS 3.1HIGH 7.5
  • TI-2026-35550 Russh: SSH message fields were decoded through allocation-first parsers before field-specific bounds CVSS 3.1HIGH 7.5
  • TI-2026-34331 Russh: Post-decompression SSH packet size was not bounded, allowing remote oversized compressed packets CVSS 3.1HIGH 7.5
  • TI-2025-16084 Tabby has a TCC Bypass via Misconfigured Node Fuses CVSS 4.0HIGH 8.6
  • TI-2024-36991 Tabby has a TCC Bypass via Unnecessary Permissive Entitlements in Tabby CVSS 4.0HIGH 8.6
  • TI-2026-82122 Missing confirmation check in russh SSH agent for constrained keys CVSS 4.0HIGH 8.3
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences