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CVE-2026-12043

HIGH
8.8
CVSS Severity Score
EPSS Score0.1950%
EPSS Percentile24.95th
PublishedJun 12, 2026
Last ModifiedJun 12, 2026

Vulnerability Description

Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2 HEADERS frames. To remediate this issue, users should upgrade to aws-c-http version 0.11.0.

Affected Platforms (CPE)

No CPE configurations currently published for this record.

References & Advisories

🔗 https://aws.amazon.com/security/security-bulletins/2026-043-aws/
🔗 https://github.com/awslabs/aws-c-http/releases/tag/v0.11.0
🔗 https://github.com/awslabs/aws-c-http/security/advisories/GHSA-rmjr-3qpm-vh98

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