CVE-2026-47844

Reactor Netty HTTP Server Leaks Exception Details

LOW

3.7

CVSS Score

Published: August 26, 2026 at 07:22 PM UTC

Updated: September 4, 2026 at 07:26 PM UTC

2 products affected across 2 vendorsReactor NettyReactor Netty

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Severity

LOW3.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Reactor Netty · Broadcom

95%

v < 1.0.531.1.0 ≤ v < 1.2.191.3.0 ≤ v < 1.3.6.1

Affected range stops below 1.0.53, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.2.19, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.3.6.1, so it looks safe — our inference, not a vendor statement

Reactor Netty · Spring

60%

v ≤ 1.0.521.1.0 ≤ v ≤ 1.2.181.3.0 ≤ v ≤ 1.3.61.1.0 1.3.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

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

References (1)

Vendor Advisory

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.7LOW[email protected]

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

NVD-CWE-noinfo

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