Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-5190— AWS C Event Stream Streaming Decoder Stack Buffer Overflow

Quick assessment

Affected
AWS aws-c-event-stream
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

aws-c-event-stream是Amazon Web Services - Labs开源的一个事件流协议C语言实现库。 aws-c-event-stream 0.6.0之前版本存在安全漏洞，该漏洞源于流解码器组件存在越界写入，可能导致处理特制事件流消息时内存损坏并执行任意代码。

CVSS 7.5 · High EPSS 0.41% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS aws-c-event-stream < 0.6.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-5190

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
AWS C Event Stream Streaming Decoder Stack Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages. To remediate this issue, users should upgrade to version 0.6.0 or later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
aws-c-event-stream 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aws-c-event-stream是Amazon Web Services - Labs开源的一个事件流协议C语言实现库。 aws-c-event-stream 0.6.0之前版本存在安全漏洞，该漏洞源于流解码器组件存在越界写入，可能导致处理特制事件流消息时内存损坏并执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS aws-c-event-stream 0 ~ 0.6.0 -

II. Public POCs for CVE-2026-5190

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10918 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-5190

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-5190 (2)

Other References for CVE-2026-5190 (1)

IV. Related Vulnerabilities

Same vendor: AWS
Same weakness: CWE-787