How severe is CVE-2026-44890?

CVE-2026-44890 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-2026-44890 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44890?

CVE-2026-44890 affects Netty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44890?

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-2026-44890 have an EU (EUVD) identifier?

Yes. CVE-2026-44890 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36357.

When was CVE-2026-44890 published?

CVE-2026-44890 was published on 2026-06-11 and last updated on 2026-06-30.

CVE-2026-44890

CVE-2026-44890 is a high-severity vulnerability in Netty 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36357
Weakness: CWE-400
Affected product: Netty
Published: 2026-06-11
Last modified: 2026-06-30

Description

Netty is a network application framework for development of protocol servers and clients. In netty-codec-redis prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can cause DoS by sending crafted Redis payloads across multiple connections without `\r\n`. This exhausts the server's direct memory pool (OutOfDirectMemoryError), preventing legitimate connections from being processed. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Frequently asked questions

What is CVE-2026-44890?: Netty is a network application framework for development of protocol servers and clients. In netty-codec-redis prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can cause DoS by sending crafted Redis payloads across multiple connections without `\r\n`. This exhausts the server's direct memory pool (OutOfDirectMemoryError), preventing legitimate connections from being processed. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
How severe is CVE-2026-44890?: CVE-2026-44890 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-2026-44890 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44890?: CVE-2026-44890 affects Netty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44890?: 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-2026-44890 have an EU (EUVD) identifier?: Yes. CVE-2026-44890 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36357.
When was CVE-2026-44890 published?: CVE-2026-44890 was published on 2026-06-11 and last updated on 2026-06-30.

References

Affected products (1)

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

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