What is CVE-2026-45673?

CVE-2026-45673 is a medium-severity vulnerability in Netty, classified under Use of Insufficiently Random Values. CVSS score: 6.8/10. Published 2026-06-12.

How severe is CVE-2026-45673?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Netty

CVE-2026-45673

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a s…

EPSS: 0.003 (17.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Netty — versions >= 4.2.0.Final, < 4.2.15.Final, < 4.1.135.Final

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45673?: CVE-2026-45673 is a medium-severity vulnerability in Netty, classified under Use of Insufficiently Random Values. CVSS score: 6.8/10. Published 2026-06-12.
How severe is CVE-2026-45673?: Medium severity. CVSS v3 base score is 6.8 out of 10.