How severe is CVE-2026-47843?

CVE-2026-47843 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-47843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-47843?

CVE-2026-47843 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-47843?

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

When was CVE-2026-47843 published?

CVE-2026-47843 was published on 2026-08-26 and last updated on 2026-09-04.

CVE-2026-47843

CVE-2026-47843 is a low-severity vulnerability in Broadcom Reactor Netty with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Broadcom Reactor Netty
Published: 2026-08-26
Last modified: 2026-09-04

Description

In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

Frequently asked questions

What is CVE-2026-47843?: In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier
How severe is CVE-2026-47843?: CVE-2026-47843 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-47843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-47843?: CVE-2026-47843 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-47843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-47843 published?: CVE-2026-47843 was published on 2026-08-26 and last updated on 2026-09-04.

References

https://spring.io/security/cve-2026-47843

Affected products (1)

cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*

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