Deserialization of Untrusted Data in Amazon Braket SDK - CVE-2026-9291
Published: August 7, 2026
Vulnerability identifier: #VU141274
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-9291
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in the deserialize_values() function when processing job results JSON files. A remote user can modify the dataFormat field and supply base64-encoded serialized payloads to execute arbitrary code.
Exploitation requires S3 write access to a Braket job output bucket and user interaction when the victim calls job.result(), load_job_result(), or load_job_checkpoint().
Affected software
Amazon Braket SDK
How to mitigate CVE-2026-9291
Install security update from vendor's website.
Amazon Braket SDK - update to 1.117.0