CVE-2026-46673: CWE-770: Allocation of Resources Without Limits or Throttling in Eugeny russh
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.
AI Analysis
Technical Summary
The vulnerability CVE-2026-46673 in the Eugeny russh library involves allocation of resources without limits or throttling (CWE-770). Specifically, CryptoVec used unchecked capacity growth and unsafe allocation/locking paths, allowing local SSH agent peers to supply attacker-controlled frame lengths that cause buffer growth before validation. Older versions prior to 0.58.0 were additionally vulnerable to remote SSH traffic exploiting transport and compression buffers. This flaw can lead to resource exhaustion or denial of service. The vulnerability is fixed in russh version 0.60.3.
Potential Impact
This vulnerability can cause denial of service (DoS) due to uncontrolled resource allocation and buffer growth. It does not impact confidentiality or integrity but can disrupt availability of the SSH service using the russh library. Both local SSH agent peers and, in older versions, remote attackers can trigger this condition.
Mitigation Recommendations
A fix is available in russh version 0.60.3. Users should upgrade to version 0.60.3 or later to remediate this vulnerability. No other mitigation or temporary workaround is indicated.
CVE-2026-46673: CWE-770: Allocation of Resources Without Limits or Throttling in Eugeny russh
Description
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-46673 in the Eugeny russh library involves allocation of resources without limits or throttling (CWE-770). Specifically, CryptoVec used unchecked capacity growth and unsafe allocation/locking paths, allowing local SSH agent peers to supply attacker-controlled frame lengths that cause buffer growth before validation. Older versions prior to 0.58.0 were additionally vulnerable to remote SSH traffic exploiting transport and compression buffers. This flaw can lead to resource exhaustion or denial of service. The vulnerability is fixed in russh version 0.60.3.
Potential Impact
This vulnerability can cause denial of service (DoS) due to uncontrolled resource allocation and buffer growth. It does not impact confidentiality or integrity but can disrupt availability of the SSH service using the russh library. Both local SSH agent peers and, in older versions, remote attackers can trigger this condition.
Mitigation Recommendations
A fix is available in russh version 0.60.3. Users should upgrade to version 0.60.3 or later to remediate this vulnerability. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-15T21:46:51.547Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a29d0250e53e73883986ccc
Added to database: 6/10/2026, 8:59:17 PM
Last enriched: 6/10/2026, 9:14:10 PM
Last updated: 6/11/2026, 12:18:08 AM
Views: 9
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