# golang.org/x/crypto/ssh (Go) vulnerabilities

Source: https://junglewise.ai/threats/technologies/golang-org-x-crypto-ssh  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/golang-org-x-crypto-ssh.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 11 vulnerabilities in golang.org/x/crypto/ssh (Go): 0 in the last 7 days and 2 in the last 90 days, 4 of them critical and 0 exploited in the wild. The most recent, CVE-2026-56855, was published on 2 September 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 11 (4 critical, 0 exploited in the wild)

## About golang.org/x/crypto/ssh (Go)

A Go package that implements an SSH client and server.

## Latest golang.org/x/crypto/ssh (Go) vulnerabilities

- [CVE-2026-56855: Go SSH deadlock vulnerability in channel handling](https://junglewise.ai/threats/cve-2026-56855-go-ssh-deadlock-vulnerability-in-channel-handling) (high, CVSS 7.5, published 2 Sep 2026)
- [CVE-2026-56854: Go SSH source-address permission validation bypass in authentication callbacks](https://junglewise.ai/threats/cve-2026-56854-go-ssh-source-address-permission-validation-bypass-in) (high, CVSS 7.5, published 28 Aug 2026)
- [CVE-2026-46597: Go x/crypto/ssh denial of service in AES-GCM decoder](https://junglewise.ai/threats/cve-2026-46597-go-x-crypto-ssh-denial-of-service-in-aes-gcm-decoder) (high, CVSS 7.5, published 22 May 2026)
- [CVE-2026-46595: Go x/crypto authorization bypass in SSH server source-address validation](https://junglewise.ai/threats/cve-2026-46595-go-x-crypto-authorization-bypass-in-ssh-server-source-address) (critical, CVSS 10, published 22 May 2026)
- [CVE-2026-39835: Go x/crypto/ssh denial of service in CertChecker](https://junglewise.ai/threats/cve-2026-39835-go-x-crypto-ssh-denial-of-service-in-certchecker) (medium, CVSS 5.3, published 22 May 2026)
- [CVE-2026-39834: Go x/crypto infinite loop in SSH channel writes](https://junglewise.ai/threats/cve-2026-39834-go-x-crypto-infinite-loop-in-ssh-channel-writes) (critical, CVSS 9.1, published 22 May 2026)
- [CVE-2026-39831: Go x/crypto/ssh physical interaction bypass for FIDO/U2F keys](https://junglewise.ai/threats/cve-2026-39831-go-x-crypto-ssh-physical-interaction-bypass-for-fido-u2f-keys) (critical, CVSS 9.1, published 22 May 2026)
- [CVE-2026-39830: Go x/crypto/ssh resource leak via unsolicited global request responses](https://junglewise.ai/threats/cve-2026-39830-go-x-crypto-ssh-resource-leak-via-unsolicited-global-request) (critical, CVSS 9.1, published 22 May 2026)
- [CVE-2026-39829: Go x/crypto/ssh denial of service in public key parsing](https://junglewise.ai/threats/cve-2026-39829-go-x-crypto-ssh-denial-of-service-in-public-key-parsing) (high, CVSS 7.5, published 22 May 2026)
- [CVE-2026-39828: Go crypto/ssh bypass of certificate restrictions in NewServerConn](https://junglewise.ai/threats/cve-2026-39828-go-crypto-ssh-bypass-of-certificate-restrictions-in-newserverconn) (medium, CVSS 6.3, published 22 May 2026)
- [CVE-2026-39827: Go x/crypto/ssh memory leak in channel rejection](https://junglewise.ai/threats/cve-2026-39827-go-x-crypto-ssh-memory-leak-in-channel-rejection) (medium, CVSS 6.5, published 22 May 2026)

## Most severe golang.org/x/crypto/ssh (Go) vulnerabilities

- [CVE-2026-46595: Go x/crypto authorization bypass in SSH server source-address validation](https://junglewise.ai/threats/cve-2026-46595-go-x-crypto-authorization-bypass-in-ssh-server-source-address) (critical, CVSS 10, published 22 May 2026)
- [CVE-2026-39834: Go x/crypto infinite loop in SSH channel writes](https://junglewise.ai/threats/cve-2026-39834-go-x-crypto-infinite-loop-in-ssh-channel-writes) (critical, CVSS 9.1, published 22 May 2026)
- [CVE-2026-39830: Go x/crypto/ssh resource leak via unsolicited global request responses](https://junglewise.ai/threats/cve-2026-39830-go-x-crypto-ssh-resource-leak-via-unsolicited-global-request) (critical, CVSS 9.1, published 22 May 2026)
- [CVE-2026-39831: Go x/crypto/ssh physical interaction bypass for FIDO/U2F keys](https://junglewise.ai/threats/cve-2026-39831-go-x-crypto-ssh-physical-interaction-bypass-for-fido-u2f-keys) (critical, CVSS 9.1, published 22 May 2026)
- [CVE-2026-46597: Go x/crypto/ssh denial of service in AES-GCM decoder](https://junglewise.ai/threats/cve-2026-46597-go-x-crypto-ssh-denial-of-service-in-aes-gcm-decoder) (high, CVSS 7.5, published 22 May 2026)
- [CVE-2026-39829: Go x/crypto/ssh denial of service in public key parsing](https://junglewise.ai/threats/cve-2026-39829-go-x-crypto-ssh-denial-of-service-in-public-key-parsing) (high, CVSS 7.5, published 22 May 2026)
- [CVE-2026-56855: Go SSH deadlock vulnerability in channel handling](https://junglewise.ai/threats/cve-2026-56855-go-ssh-deadlock-vulnerability-in-channel-handling) (high, CVSS 7.5, published 2 Sep 2026)
- [CVE-2026-56854: Go SSH source-address permission validation bypass in authentication callbacks](https://junglewise.ai/threats/cve-2026-56854-go-ssh-source-address-permission-validation-bypass-in) (high, CVSS 7.5, published 28 Aug 2026)
- [CVE-2026-39827: Go x/crypto/ssh memory leak in channel rejection](https://junglewise.ai/threats/cve-2026-39827-go-x-crypto-ssh-memory-leak-in-channel-rejection) (medium, CVSS 6.5, published 22 May 2026)
- [CVE-2026-39828: Go crypto/ssh bypass of certificate restrictions in NewServerConn](https://junglewise.ai/threats/cve-2026-39828-go-crypto-ssh-bypass-of-certificate-restrictions-in-newserverconn) (medium, CVSS 6.3, published 22 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 1 | 0 | 0 |
| 31 Aug 2026 | 1 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Go technologies

- [github.com/mattermost/mattermost-server (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server): 297 vulnerabilities
- [github.com/mattermost/mattermost-server/v6 (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v6): 222 vulnerabilities
- [github.com/mattermost/mattermost/server/v8 (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v8): 207 vulnerabilities
- [github.com/mattermost/mattermost-server/v5 (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v5): 199 vulnerabilities
- [stdlib (Go)](https://junglewise.ai/threats/technologies/go-stdlib): 178 vulnerabilities
- [github.com/siyuan-note/siyuan/kernel (Go)](https://junglewise.ai/threats/technologies/github-com-siyuan-note-siyuan-kernel): 160 vulnerabilities
- [code.gitea.io/gitea (Go)](https://junglewise.ai/threats/technologies/code-gitea-io-gitea): 126 vulnerabilities
- [code.vikunja.io/api (Go)](https://junglewise.ai/threats/technologies/code-vikunja-io-api): 91 vulnerabilities
- [gogs.io/gogs (Go)](https://junglewise.ai/threats/technologies/gogs-io-gogs): 81 vulnerabilities
- [github.com/traefik/traefik/v2 (Go)](https://junglewise.ai/threats/technologies/github-com-traefik-traefik-v2): 78 vulnerabilities
- [github.com/traefik/traefik (Go)](https://junglewise.ai/threats/technologies/github-com-traefik-traefik): 75 vulnerabilities
- [github.com/usememos/memos (Go)](https://junglewise.ai/threats/technologies/github-com-usememos-memos): 75 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "golang.org/x/crypto/ssh (Go) vulnerabilities", https://junglewise.ai/threats/technologies/golang-org-x-crypto-ssh, 13 November 2026.