7.7

CVE-2026-5190: aws aws-c-event-stream Out-of-bounds Write

CVSS: 7.7v4.0HighAwaiting analysis
AliasesopenSUSE-SU-2026:10512-1openSUSE-SU-2026:20477-1
Published 31-03-2026Last modified 20-10-2026
Open JSON

Vulnerability summary

CVE-2026-5190 is a high (CVSS 7.7) Out-of-bounds Write vulnerability in aws aws-c-event-stream. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.53%
0%100%
Low · +0.15 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-03-2026
    PublishedVulnerability first disclosed.
  2. 20-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

+0.15 pp

From 0.38% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Opensuse2 products
  • aws-c-event-stream&distro=openSUSE Leap 16.0< 0.4.2-bp160.2.1
  • aws-c-event-stream&distro=openSUSE Tumbleweed< 0.7.0-1.1
Aws1 product

2 vendors · 3 products

References

5 links