How severe is CVE-2026-39828?

CVE-2026-39828 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-39828 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39828?

CVE-2026-39828 affects Golang Crypto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39828?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-39828 have an EU (EUVD) identifier?

Yes. CVE-2026-39828 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31394.

When was CVE-2026-39828 published?

CVE-2026-39828 was published on 2026-05-22 and last updated on 2026-07-08.

CVE-2026-39828

CVE-2026-39828 is a medium-severity vulnerability in Golang Crypto with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31394
Weakness: CWE-295
Affected product: Golang Crypto
Published: 2026-05-22
Last modified: 2026-07-08

Description

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.

Frequently asked questions

What is CVE-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 PartialSuccessError now results in a connection error.
How severe is CVE-2026-39828?: CVE-2026-39828 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-39828 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39828?: CVE-2026-39828 affects Golang Crypto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39828?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39828 have an EU (EUVD) identifier?: Yes. CVE-2026-39828 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31394.
When was CVE-2026-39828 published?: CVE-2026-39828 was published on 2026-05-22 and last updated on 2026-07-08.

References

Affected products (1)

cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*

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