RewindexCVEsAmazon Web Services
CVE-2026-5190: AWS C Event Stream Streaming Decoder Stack Buffer Overflow
High · CVSS 7.5 (CVSS 3.1)EPSS 0.41%, 35th percentilePublished Updated Assigner: AMZN
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.
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H · CWE-787
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
AWS: aws-c-event-stream
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- aws.amazon.com/security/security-bulletins/2026-011-aws/ (opens in new tab)
- github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0 (opens in new tab)
- github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)