CVE-2026-5190CWE-787

CVE-2026-5190

High · published March 31, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
44.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00531 · 44.0th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-03-31T22:16Z
References (3)
https://aws.amazon.com/security/security-bulletins/2026-011-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 31 MAR 17:05Z
    AWS C Event Stream Streaming Decoder Stack Buffer Overflow
    cvelistv5