How severe is CVE-2026-39827?

CVE-2026-39827 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-39827 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39827?

CVE-2026-39827 affects Golang Crypto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39827?

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

Does CVE-2026-39827 have an EU (EUVD) identifier?

Yes. CVE-2026-39827 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31392.

When was CVE-2026-39827 published?

CVE-2026-39827 was published on 2026-05-22 and last updated on 2026-06-17.

CVE-2026-39827

CVE-2026-39827 is a medium-severity vulnerability in Golang Crypto with a CVSS 3.x base score of 6.5. 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-924.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31392
Weakness: CWE-924
Affected product: Golang Crypto
Published: 2026-05-22
Last modified: 2026-06-17

Description

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Frequently asked questions

What is CVE-2026-39827?: An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
How severe is CVE-2026-39827?: CVE-2026-39827 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-39827 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39827?: CVE-2026-39827 affects Golang Crypto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39827?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39827 have an EU (EUVD) identifier?: Yes. CVE-2026-39827 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31392.
When was CVE-2026-39827 published?: CVE-2026-39827 was published on 2026-05-22 and last updated on 2026-06-17.

References

Affected products (1)

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

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