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Home/Vulnerability/CVE-2026-12043

CVE-2026-12043

Heap double-free in AWS Common Runtime aws-c-http

Published: Jun 12, 2026Updated: Jun 12, 2026 Sources: CVE List NVD
NVD MITRE
8.8CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-415

Affected Products

aws-c-http
AWS
Cloud & SaaS / cloud-platform
awscommercialUSCloud & SaaSaka aws

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://aws.amazon.com/security/security-bulletins/2026-043-aws/
aws.amazon.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
github.com

Timeline

Published
Jun 12, 2026
Last Updated
Jun 12, 2026

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