SecuriTricks - CVE-2026-12043

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.

Product(s) Impacted

Vendor	Product	Versions
Aws	Aws-c-http	0.11.0, *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-415

Double Free

The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	aws	aws-c-http	0.11.0	/	/	/	/	/	/	/
a	aws	aws-c-http	/	/	/	/	/	/	/	/

References

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

CVSS Score

8.7 / 10

CVSS Data - 4.0

Attack Vector: NETWORK
Attack Complexity: LOW
Attack Requirements: NONE
Privileges Required: NONE
User Interaction: PASSIVE
Scope:
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: HIGH
Exploit Maturity: NOT_DEFINED

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

View Vector String

Timeline

Published: June 12, 2026, 7:16 p.m.
Last Modified: June 12, 2026, 8:16 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

ff89ba41-3aa1-4d27-914a-91399e9639e5

CVE-2026-12043