Vulnerability · CVE-2026-39828
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certi…
Published May 22, 2026 · catalog updated Sep 11, 2026 · the affected product
Last checked Oct 27, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-39828. EPSS is 0.37%. Act only if a listed version of the affected product is installed.
Gaps on this record
- No plain product name is stored. The page cannot tell you which product to check.
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-46598 · Medium
- CVE-2026-46597 · High
- CVE-2026-46595 · Critical
- CVE-2026-42508 · Critical
- CVE-2026-39835 · Medium
- Severity
- Medium6.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.37%
- Remediation
- Advisory link
- Affected products
- cpe golang/crypto
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe golang/cryptoversion unspecified
How to fix CVE-2026-39828
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the bsi record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-39828. EPSS is 0.37%. Act only if a listed version of the affected product is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-281; CWE-295: Improper Certificate Validation. EPSS 0.37%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 22, 2026 · NIST NVD
Detected
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.
Sep 11, 2026 · NIST NVD
Updated
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.
Sources
- BSI CERT-BundGovernment advisoryCVE-2026-39828
Golang Go-Module (Net, Image, Crypto: Mehrere Schwachstellen
wid.cert-bund.de - CVE.orgVulnerability recordCVE-2026-39828
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-39828
30-day exploitation probability 0.37%
first.org - NIST NVDVulnerability recordCVE-2026-39828
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 Par
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- BSI CERT-BundOct 27, 2026
- FIRST EPSSOct 26, 2026
- NIST NVDOct 18, 2026
- CVE.orgOct 16, 2026