How severe is CVE-2026-39836?

CVE-2026-39836 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-39836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39836?

CVE-2026-39836 affects Golang Go. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39836?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39836 have an EU (EUVD) identifier?

Yes. CVE-2026-39836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28427.

When was CVE-2026-39836 published?

CVE-2026-39836 was published on 2026-05-07 and last updated on 2026-06-17.

CVE-2026-39836

CVE-2026-39836 is a high-severity vulnerability in Golang Go with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28427
Weakness: CWE-476
Affected product: Golang Go
Published: 2026-05-07
Last modified: 2026-06-17

Description

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).

Frequently asked questions

What is CVE-2026-39836?: The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).
How severe is CVE-2026-39836?: CVE-2026-39836 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-39836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39836?: CVE-2026-39836 affects Golang Go. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39836 have an EU (EUVD) identifier?: Yes. CVE-2026-39836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28427.
When was CVE-2026-39836 published?: CVE-2026-39836 was published on 2026-05-07 and last updated on 2026-06-17.

References

Affected products (1)

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

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