How severe is CVE-2026-47844?

CVE-2026-47844 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-2026-47844 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-47844?

CVE-2026-47844 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-47844?

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

When was CVE-2026-47844 published?

CVE-2026-47844 was published on 2026-08-26 and last updated on 2026-09-04.

CVE-2026-47844

CVE-2026-47844 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (14th 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, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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-2026-47844?: In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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-2026-47844?: CVE-2026-47844 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-2026-47844 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-47844?: CVE-2026-47844 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-47844?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-47844 published?: CVE-2026-47844 was published on 2026-08-26 and last updated on 2026-09-04.

References

https://spring.io/security/cve-2026-47844

Affected products (1)

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

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