How severe is CVE-2026-39819?

CVE-2026-39819 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2026-39819 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39819?

CVE-2026-39819 affects Golang Go. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39819?

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

Does CVE-2026-39819 have an EU (EUVD) identifier?

Yes. CVE-2026-39819 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28422.

When was CVE-2026-39819 published?

CVE-2026-39819 was published on 2026-05-07 and last updated on 2026-06-17.

CVE-2026-39819

CVE-2026-39819 is a medium-severity vulnerability in Golang Go with a CVSS 3.x base score of 5.3. 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28422
Weakness: CWE-59
Affected product: Golang Go
Published: 2026-05-07
Last modified: 2026-06-17

Description

The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.

Frequently asked questions

What is CVE-2026-39819?: The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.
How severe is CVE-2026-39819?: CVE-2026-39819 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2026-39819 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39819?: CVE-2026-39819 affects Golang Go. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39819?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39819 have an EU (EUVD) identifier?: Yes. CVE-2026-39819 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28422.
When was CVE-2026-39819 published?: CVE-2026-39819 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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