How severe is CVE-2019-19794?

CVE-2019-19794 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2019-19794 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19794?

CVE-2019-19794 affects Miekg-dns Project Miekg-dns. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19794?

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

When was CVE-2019-19794 published?

CVE-2019-19794 was published on 2019-12-13 and last updated on 2026-06-17.

CVE-2019-19794

CVE-2019-19794 is a medium-severity vulnerability in Miekg-dns Project Miekg-dns with a CVSS 3.x base score of 5.9. 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-338.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-338
Affected product: Miekg-dns Project Miekg-dns
Published: 2019-12-13
Last modified: 2026-06-17

Description

The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries.

Frequently asked questions

What is CVE-2019-19794?: The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries.
How severe is CVE-2019-19794?: CVE-2019-19794 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2019-19794 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19794?: CVE-2019-19794 affects Miekg-dns Project Miekg-dns. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19794?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-19794 published?: CVE-2019-19794 was published on 2019-12-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:miekg-dns_project:miekg-dns:*:*:*:*:*:*:*:*

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