CVE-2026-46673Public exploitNetwork attack vector

Process abort via unchecked buffer growth

Published Jun 10, 2026 · Updated Jun 10, 2026

Resource exhaustion in Eugeny russh before 0.60.3 allows attackers to crash processes through oversized SSH-related inputs. AgentClient::read_response and Connection::run trusted peer-supplied 32-bit frame lengths when resizing buffers, while historical transport and zlib paths grew CryptoVec with unchecked size arithmetic and allocation handling. Current exposure requires a local SSH agent peer; remote SSH traffic reaches the demonstrated process-abort path only before 0.58.0 and under constrained memory.

CVSS severity7.5
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Eugeny russh before 0.60.3 allows attackers to crash processes through oversized SSH-related inputs. AgentClient::read_response and Connection::run trusted peer-supplied 32-bit frame lengths when resizing buffers, while historical transport and zlib paths grew CryptoVec with unchecked size arithmetic and allocation handling. Current exposure requires a local SSH agent peer; remote SSH traffic reaches the demonstrated process-abort path only before 0.58.0 and under constrained memory.

The record

CVE
CVE-2026-46673
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Russh Project
Product
russh
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.60.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Russh Project · russhversion=< 0.60.3

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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