CVE-2026-39828: Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh

Published May 22, 2026
·
Updated

Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh

Other sources

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.

— MITRE

Affected Software

21 affected componentsFixes available
go/golang.org/x/crypto/ssh
Microsoft azl3 kubevirt 1.7.1-2
Patch available
Microsoft azl3 cert-manager 1.12.15-6
Patch available
Microsoft azl3 packer 1.9.5-13
Patch available
Microsoft azl3 cf-cli 8.7.11-6
Patch available
Microsoft azl3 gh 2.62.0-16
Patch available
Microsoft azl3 telegraf 1.31.0-22
Patch available
go/golang.org/x/crypto/ssh<0.52.0
0.52.0
Golang Crypto Go<0.52.0
Microsoft azl3 kubevirt 1.7.1-2<1.7.1-5
1.7.1-5
Microsoft azl3 cert-manager 1.12.15-6<1.12.15-8
1.12.15-8
Microsoft azl3 packer 1.9.5-13<1.9.5-14
1.9.5-14
Microsoft azl3 telegraf 1.31.0-22<1.31.0-23
1.31.0-23
Microsoft azl3 cf-cli 8.7.11-6<8.7.11-7
8.7.11-7
Microsoft azl3 telegraf 1.31.0-23<1.31.0-23
1.31.0-23
Microsoft azl3 cf-cli 8.7.11-7<8.7.11-7
8.7.11-7
Microsoft azl3 gh 2.62.0-17<2.62.0-17
2.62.0-17
Microsoft azl3 gh 2.62.0-16<2.62.0-17
2.62.0-17
Microsoft azl3 gh 2.62.0-18<2.62.0-17
2.62.0-17
IBM Db2 Genius Hub<=1.1, 1.1.1, 1.1.2
IBM Agentics<=1.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade go/golang.org/x/crypto/ssh to a version that resolves this vulnerability.

    Fixed in 0.52.0
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.7.1-5
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.12.15-8
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.31.0-23
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.9.5-14
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 8.7.11-7
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.62.0-17

Event History

May 22, 2026
CVE Published
via MITRE·02:31 AM
Data Sourced
via MITRE·02:31 AM
DescriptionWeakness
Data Sourced
via Red Hat·04:02 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·04:16 AM
DescriptionSeverityWeaknessAffected Software
May 27, 2026
Data Sourced
via Microsoft·08:16 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·08:16 AM
Affected Software
Updated
via Microsoft·08:16 AM
DescriptionSeverity
Jun 25, 2026
Advisory Published
via GitHub·10:14 PM
Data Sourced
via GitHub·10:14 PM
DescriptionSeverityWeaknessAffected Software
Jul 13, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-39828?

CVE-2026-39828 has a risk rating of 47, indicating a moderate level of severity.

2

How do I fix CVE-2026-39828?

To fix CVE-2026-39828, update to the latest version of golang.org/x/crypto/ssh that addresses the issue.

3

What key issue does CVE-2026-39828 address?

CVE-2026-39828 addresses the issue where permissions in SSH server authentication could be discarded, compromising certificate restrictions.

4

What is the impact of CVE-2026-39828?

The impact of CVE-2026-39828 is that it may allow unauthorized actions due to lost permissions after a second factor succeeds.

5

When was CVE-2026-39828 published?

CVE-2026-39828 was published on May 22, 2026.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203