CVE-2026-47874: CWE-770 Allocation of Resources Without Limits or Throttling in Spring Reactor Netty
Description
CVE-2026-47874 is a medium severity vulnerability in Spring Reactor Netty where HTTP/1.1 pipelined requests over a single connection can cause excessive memory consumption. This affects multiple versions of Reactor Netty, including 1.0.52 and earlier, 1.1.0 through 1.2.18, and 1.3.0 through 1.3.6. The issue is related to allocation of resources without limits or throttling (CWE-770). No official patch or remediation guidance is currently provided.
CVSS v3.1
Score 5.3medium
Affected software
Spring
Reactor Netty
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Spring Reactor Netty arises when a client sends HTTP/1.1 pipelined requests over a single connection, leading the HTTP server to consume an excessive amount of memory. This is due to allocation of resources without proper limits or throttling, classified under CWE-770. Affected versions include 1.0.52 and earlier, 1.1.0 through 1.2.18, and 1.3.0 through 1.3.6. The CVSS 3.1 base score is 5.3, indicating a medium severity impact focused on availability (denial of service) without confidentiality or integrity impact. No vendor advisory or patch information is currently available.
Potential Impact
The vulnerability can cause the Reactor Netty HTTP server to consume excessive memory when processing HTTP/1.1 pipelined requests, potentially leading to denial of service due to resource exhaustion. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider limiting or disabling HTTP/1.1 pipelining if possible as a temporary mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- vmware
- Date Reserved
- 2026-05-20T10:00:57.077Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8f86fcacd9273b4994709a
Added to database: 08/27/2026, 00:38:20 UTC
Last enriched: 09/10/2026, 09:38:25 UTC
Last updated: 10/09/2026, 18:48:20 UTC
Views: 116
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