CVE-2026-12043

HIGH EPSS 27.0%
Published Jun 12, 20262w ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published Jun 12, 2026 2w ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
27.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-415

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.