CVE-2026-39830NVD

Vulnerability Summary

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

Severity Level

CRITICAL(9.1)

Published Date

May 22, 2026

Last Modified

Sep 11, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.62%Probability

Root Weakness (CWE)

N/A

CVSS v3.1 Base Metrics — Score 9.1 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

Affected & Patched Versions

Affected Versions

Golang Crypto < 0.52.0

Patched Versions

Golang Crypto 0.52.0

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