Double Free Affecting awslabs/aws-c-http package, versions [0.4.22,0.11.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jun 2026
- disclosed12 Jun 2026
- creditUnknown
Introduced: 12 Jun 2026
CVE-2026-12043 (opens in a new tab)How to fix?
Upgrade awslabs/aws-c-http to version 0.11.0 or higher.
Overview
Affected versions of this package are vulnerable to Double Free via improper handling of HPACK dynamic table size updates. An attacker can trigger memory corruption and potentially execute arbitrary code by sending a crafted sequence of HTTP/2 HEADERS frames from a malicious server.