CVE-2026-39827

MEDIUM 6.5

Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

5th

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Vendor	golang.org/x/crypto
Product	golang.org/x/crypto/ssh
Published	May 22, 2026
Last Updated	May 22, 2026

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Affected Versions

golang.org/x/crypto / golang.org/x/crypto/ssh

0 < 0.52.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/issue/35127 go.dev: https://go.dev/cl/781320 groups.google.com: https://groups.google.com/g/golang-announce/c/a082jnz-LvI pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-5016

Credits

Ziyan Zhou