# Improper Verification of Cryptographic Signature in aws-encryption-sdk

Source: https://junglewise.ai/threats/improper-verification-of-cryptographic-signature-in-aws-encryption-sdk-b9344234  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-06-01  
License: CC BY 4.0 with a link back

Severity: info · Published 2021-06-01

Improper Verification of Cryptographic Signature in aws-encryption-sdk

Technologies: [aws-encryption-sdk (PyPI)](https://junglewise.ai/threats/technologies/aws-encryption-sdk). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 1 June 2021.

**Which products and versions are affected?** aws-encryption-sdk (PyPI) ECOSYSTEM:introduced=0,fixed=1.9.0.

**Is there a fix for This vulnerability?** Yes. aws-encryption-sdk (PyPI): upgrade to 1.9.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run aws-encryption-sdk (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- aws-encryption-sdk (PyPI): upgrade to 1.9.0 or later

  ```sh
  pip install "aws-encryption-sdk>=1.9.0"
  ```


## Affected products

- aws-encryption-sdk (PyPI) ECOSYSTEM:introduced=0,fixed=1.9.0

## Related threats

- [Cryptographic algorithm downgrade in the caching layer of Amazon AWS Encryption SDK for Python before version 3.3.1 and before version 4.0.](https://junglewise.ai/threats/cve-2026-6550-aws-encryption-sdk-for-python-key-commitment-policy-bypass-via)
- [Security issues in AWS KMS and AWS Encryption SDKs: in-band protocol negotiation and robustness](https://junglewise.ai/threats/cve-2020-8897-security-issues-in-aws-kms-and-aws-encryption-sdks-in-band)