How severe is CVE-2026-47845?

CVE-2026-47845 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-47845 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-47845?

CVE-2026-47845 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-47845?

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

When was CVE-2026-47845 published?

CVE-2026-47845 was published on 2026-08-27 and last updated on 2026-09-04.

CVE-2026-47845

CVE-2026-47845 is a medium-severity vulnerability in Broadcom Reactor Netty with a CVSS 3.x base score of 5.3. 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-290.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-290
Affected product: Broadcom Reactor Netty
Published: 2026-08-27
Last modified: 2026-09-04

Description

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. 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-2026-47845?: In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. 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-2026-47845?: CVE-2026-47845 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-47845 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-47845?: CVE-2026-47845 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-47845?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-47845 published?: CVE-2026-47845 was published on 2026-08-27 and last updated on 2026-09-04.

References

https://spring.io/security/cve-2026-47845

Affected products (1)

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

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