CVE-2026-42189Disclosure(russh_project / russh)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch russh_project russh systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Russh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive authentication handler. A malicious client can crash any russh-based server that implements keyboard-interactive auth (e.g., for 2FA/TOTP) with a single malformed packet, requiring no credentials. This issue has been patched in version 0.60.1.

1.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-770CWE-789

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • russh
  • warpgate

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-05-08); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Products
russhwarpgate

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-05-08: 1Mentions · 2026-05-09: 1Patch / Workaround · 2026-05-09: 1Technical Details · 2026-05-08: 1Technical Details · 2026-05-09: 105-0805-09
Signal classification2 categories
Disclosure
150.0%
Patch
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-05-081
Disclosure1
2026-05-091
Patch1
Full discourse2 posts
  • CVE@CVEnew
    Patch

    CVE-2026-42189 Russh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive… https://www.cve.org/CVERecord?id=CVE-2026-42189

    Post summary

    A pre-authentication DoS flaw exists in the Rust SSH library Russh, fixed starting with version 0.60.1, with no discussion of active exploitation or PoC.

    00000118
    57.5K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-42189 Pre-Authentication Denial-of-Service in Russh SSH Server Before 0.60.1 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42189

    Post summary

    The post announces a pre-authentication Denial-of-Service vulnerability in Russh SSH Server versions before 0.60.1, with no indication of PoC, exploit tools, or active exploitation.

    0000044
    4.0K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Apprussh_projectrussh-rust-
Appwarpgate_projectwarpgate---

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