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Vulnerability Details CVE-2026-32314

Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect("stream not found"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 19.1%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-32314
  • Protocol » Yamux » Version: 0.1.0
    cpe:2.3:a:protocol:yamux:0.1.0
  • Protocol » Yamux » Version: 0.1.1
    cpe:2.3:a:protocol:yamux:0.1.1
  • Protocol » Yamux » Version: 0.1.2
    cpe:2.3:a:protocol:yamux:0.1.2
  • Protocol » Yamux » Version: 0.1.3
    cpe:2.3:a:protocol:yamux:0.1.3
  • Protocol » Yamux » Version: 0.1.4
    cpe:2.3:a:protocol:yamux:0.1.4
  • Protocol » Yamux » Version: 0.1.5
    cpe:2.3:a:protocol:yamux:0.1.5
  • Protocol » Yamux » Version: 0.1.6
    cpe:2.3:a:protocol:yamux:0.1.6
  • Protocol » Yamux » Version: 0.1.7
    cpe:2.3:a:protocol:yamux:0.1.7
  • Protocol » Yamux » Version: 0.1.8
    cpe:2.3:a:protocol:yamux:0.1.8
  • Protocol » Yamux » Version: 0.1.9
    cpe:2.3:a:protocol:yamux:0.1.9
  • Protocol » Yamux » Version: 0.10.0
    cpe:2.3:a:protocol:yamux:0.10.0
  • Protocol » Yamux » Version: 0.10.1
    cpe:2.3:a:protocol:yamux:0.10.1
  • Protocol » Yamux » Version: 0.10.2
    cpe:2.3:a:protocol:yamux:0.10.2
  • Protocol » Yamux » Version: 0.11.0
    cpe:2.3:a:protocol:yamux:0.11.0
  • Protocol » Yamux » Version: 0.11.1
    cpe:2.3:a:protocol:yamux:0.11.1
  • Protocol » Yamux » Version: 0.12.0
    cpe:2.3:a:protocol:yamux:0.12.0
  • Protocol » Yamux » Version: 0.12.1
    cpe:2.3:a:protocol:yamux:0.12.1
  • Protocol » Yamux » Version: 0.13.0
    cpe:2.3:a:protocol:yamux:0.13.0
  • Protocol » Yamux » Version: 0.13.1
    cpe:2.3:a:protocol:yamux:0.13.1
  • Protocol » Yamux » Version: 0.13.2
    cpe:2.3:a:protocol:yamux:0.13.2
  • Protocol » Yamux » Version: 0.13.3
    cpe:2.3:a:protocol:yamux:0.13.3
  • Protocol » Yamux » Version: 0.13.4
    cpe:2.3:a:protocol:yamux:0.13.4
  • Protocol » Yamux » Version: 0.13.5
    cpe:2.3:a:protocol:yamux:0.13.5
  • Protocol » Yamux » Version: 0.13.6
    cpe:2.3:a:protocol:yamux:0.13.6
  • Protocol » Yamux » Version: 0.13.7
    cpe:2.3:a:protocol:yamux:0.13.7
  • Protocol » Yamux » Version: 0.13.8
    cpe:2.3:a:protocol:yamux:0.13.8
  • Protocol » Yamux » Version: 0.13.9
    cpe:2.3:a:protocol:yamux:0.13.9
  • Protocol » Yamux » Version: 0.2.0
    cpe:2.3:a:protocol:yamux:0.2.0
  • Protocol » Yamux » Version: 0.2.1
    cpe:2.3:a:protocol:yamux:0.2.1
  • Protocol » Yamux » Version: 0.2.2
    cpe:2.3:a:protocol:yamux:0.2.2
  • Protocol » Yamux » Version: 0.3.0
    cpe:2.3:a:protocol:yamux:0.3.0
  • Protocol » Yamux » Version: 0.4.0
    cpe:2.3:a:protocol:yamux:0.4.0
  • Protocol » Yamux » Version: 0.4.1
    cpe:2.3:a:protocol:yamux:0.4.1
  • Protocol » Yamux » Version: 0.4.2
    cpe:2.3:a:protocol:yamux:0.4.2
  • Protocol » Yamux » Version: 0.4.3
    cpe:2.3:a:protocol:yamux:0.4.3
  • Protocol » Yamux » Version: 0.4.4
    cpe:2.3:a:protocol:yamux:0.4.4
  • Protocol » Yamux » Version: 0.4.5
    cpe:2.3:a:protocol:yamux:0.4.5
  • Protocol » Yamux » Version: 0.4.6
    cpe:2.3:a:protocol:yamux:0.4.6
  • Protocol » Yamux » Version: 0.4.7
    cpe:2.3:a:protocol:yamux:0.4.7
  • Protocol » Yamux » Version: 0.4.8
    cpe:2.3:a:protocol:yamux:0.4.8
  • Protocol » Yamux » Version: 0.4.9
    cpe:2.3:a:protocol:yamux:0.4.9
  • Protocol » Yamux » Version: 0.5.0
    cpe:2.3:a:protocol:yamux:0.5.0
  • Protocol » Yamux » Version: 0.6.0
    cpe:2.3:a:protocol:yamux:0.6.0
  • Protocol » Yamux » Version: 0.7.0
    cpe:2.3:a:protocol:yamux:0.7.0
  • Protocol » Yamux » Version: 0.8.0
    cpe:2.3:a:protocol:yamux:0.8.0


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