How severe is CVE-2026-45674?

CVE-2026-45674 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-45674 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45674?

CVE-2026-45674 affects Netty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45674?

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-2026-45674 have an EU (EUVD) identifier?

Yes. CVE-2026-45674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36450.

When was CVE-2026-45674 published?

CVE-2026-45674 was published on 2026-06-12 and last updated on 2026-07-03.

CVE-2026-45674

CVE-2026-45674 is a high-severity vulnerability in Netty with a CVSS 3.x base score of 8.7. 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-345.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36450
Weakness: CWE-345
Affected product: Netty
Published: 2026-06-12
Last modified: 2026-07-03

Description

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 DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Frequently asked questions

What is CVE-2026-45674?: 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 DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
How severe is CVE-2026-45674?: CVE-2026-45674 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-45674 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45674?: CVE-2026-45674 affects Netty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45674?: 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-2026-45674 have an EU (EUVD) identifier?: Yes. CVE-2026-45674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36450.
When was CVE-2026-45674 published?: CVE-2026-45674 was published on 2026-06-12 and last updated on 2026-07-03.

References

Affected products (1)

cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*

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