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RequestGuard Vulnerabilities
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CVE record

CVE-2026-39830

Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh

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.

CVE evidence

Known exploitation

Not listed in fetched KEV catalog

Absence from the fetched catalog does not establish that exploitation has not occurred.

Severity

critical

CVSS 9.1 ยท CVSS_V3

Affected packages

1

Supported package records returned by OSV. Vendor and product names are not used to infer matches.

OSV package mapping

Affected open-source packages

PackageEcosystemFixed versions
golang.org/x/cryptogo0.52.0