intelligence_src_b35573840dfc5ce6da
- Source-provided label
- Publisher RSS metadata
- Evidence class
- mentioned in report
- Confidence
- Not reported
- Observed
- Sep 09, 2026 21:30 UTC
- Retrieved
- Oct 14, 2026 14:33 UTC
CVE-2026-83551 - Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK
Bulletin ID: 2026-093-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/01/2026 11:00 AM PDT Description: SageMaker Python SDK's @step and @remote decorator pipeline component uses an HMAC key to protect the integrity of serialized function payloads stored in S3. We identified an issue where the HMAC secret key is stored in cleartext within pipeline definitions and accessible via the DescribePipeline API. This allows an actor with a role in that account that has permissions to invoke DescribePipeline to extract the key, create cloud-pickled payloads with valid HMACs, and overwrite S3 objects, achieving code execution in another user's pipeline execution context within the same AWS account. Impacted versions: - HMAC Configuration in SageMaker Python SDK v3 < v3.11.0 - HMAC Configuration in SageMaker Python SDK v2 < v2.256.0 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
Reference details
- Source category
- research-report
- First reported
- Sep 09, 2026 21:30 UTC
- Last reported
- Sep 09, 2026 21:30 UTC
- Catalog updated
- Oct 14, 2026 14:33 UTC
- Record ID
5ee7a2b43e15b7995b2229b55973456ecd158ed83294eefd0dde82e183bbe31d
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