CVE-2026-39829

Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

CVSS 7.5 HIGHEPSS 0.3%

Vexday Risk Score

21Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 7.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

22 mai 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Produtos afetados

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

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Referências

https://go.dev/cl/781641 https://go.dev/cl/781661 https://go.dev/issue/79565 https://groups.google.com/g/golang-announce/c/a082jnz-LvI https://pkg.go.dev/vuln/GO-2026-5018