CVE-2026-12043 | THREATINT

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.

PUBLISHED Reserved 2026-06-11 | Published 2026-06-12 | Updated 2026-06-12 | Assigner AMZN

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-415 Double free

Product status

Default status

unaffected

0.4.22 (custom)

affected

References

github.com/awslabs/aws-c-http/releases/tag/v0.11.0 patch

aws.amazon.com/security/security-bulletins/2026-043-aws/ vendor-advisory

github.com/...c-http/security/advisories/GHSA-rmjr-3qpm-vh98 third-party-advisory

cve.org (CVE-2026-12043)

nvd.nist.gov (CVE-2026-12043)

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