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CVE-2026-47861— UDP adapter sends ack to attacker-supplied host:port parsed from packet body, even when acknowledge=false

Quick assessment

Affected
Spring Spring Integration
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

一个未认证的远程攻击者，只要向 Spring Integration 的 UDP 入站适配器发送一个 UDP 数据包，就能让服务器向攻击者指定的任意内部或外部主机和端口发送一个出站 UDP 数据报。 受影响的版本： Spring Integration 7.1.0 Spring Integration 7.0.0 至 7.0.5 Spring Integration 6.5.0 至 6.5.10 Spring Integration 6.4.0 至 6.4.12 Spring Integration 5.5.21

CVSS 6.3 · Medium
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I. Basic Information for CVE-2026-47861

Vulnerability Information
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Vulnerability Title
UDP adapter sends ack to attacker-supplied host:port parsed from packet body, even when acknowledge=false
Source: CVE Program / CVE List V5
Vulnerability Description
An unauthenticated remote attacker who can send a single UDP packet to a Spring Integration UDP inbound adapter can cause the server to emit an outbound UDP datagram to an arbitrary internal or external host and port of the attacker's choosing. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Spring Integration 7.1.0 -

II. Public POCs for CVE-2026-47861

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III. Intelligence Information for CVE-2026-47861

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Vendor Advisories for CVE-2026-47861 (1)

Same Patch Batch · Spring · 2026-08-26 · 20 CVEs total

CVE-2026-47852 7.5 HIGH Predictable cache directory location allows local ONNX model substitution in Spring AI
CVE-2026-47851 7.5 HIGH Unbounded recursion over attacker-controlled PDF outline tree in Spring AI PDF Document Re
CVE-2026-47841 7.4 HIGH WebAuthn User Verification Bypass via Session Serialization
CVE-2026-47836 7.2 HIGH Spring Cloud Config Server Susceptible To TOCTOU Attack When Using SVN
CVE-2026-47837 6.8 MEDIUM Spring Cloud Config Server Monitor Endpoint Does Not Validate Webhook Requests
CVE-2026-47860 6.5 MEDIUM Unbounded decompression of attacker-supplied compressed message bodies
CVE-2026-47842 6.5 MEDIUM Deterministic AES/CBC Encryption in Spring Security AesBytesEncryptor Allows Ciphertext Co
CVE-2026-47856 6.3 MEDIUM JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class w
CVE-2026-47848 6.1 MEDIUM Reactor Netty WebSocket Client Leaks Credentials On Redirect
CVE-2026-47863 5.9 MEDIUM Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream deli
CVE-2026-47857 5.9 MEDIUM Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around
CVE-2026-47862 5.4 MEDIUM ZipTransformer uses file_name header to build workDirectory path without sanitization
CVE-2026-47859 5.4 MEDIUM Unbounded memory allocation in RFC6587SyslogDeserializer (octet-counted framing) — remote
CVE-2026-47874 5.3 MEDIUM Reactor Netty HTTP Server Denial of Service With Pipelined Requests
CVE-2026-47845 5.3 MEDIUM Reactor Netty HTTP Server may incorrectly evaluate proxy addresses
CVE-2026-47844 5.3 MEDIUM Reactor Netty HTTP Server Leaks Exception Details
CVE-2026-47834 4.8 MEDIUM Spring Data JPA Sort expression validation bypass
CVE-2026-47850 4.3 MEDIUM Spring Data REST allows mutation of the version property of immutable aggregates via PUT
CVE-2026-47843 3.7 LOW Reactor Netty may incorrectly route traffic due to DNS resolver reuse

IV. Related Vulnerabilities

Same product: Spring Integration
Same vendor: Spring

V. Comments for CVE-2026-47861

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