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CVE-2026-6550

MEDIUM

4.7

Description

Cryptographic algorithm downgrade in the caching layer of Amazon AWS Encryption SDK for Python before version 3.3.1 and before version 4.0.5 might allow an authenticated local threat actor to bypass key commitment policy enforcement via a shared key cache, resulting in ciphertext that can be decrypted to multiple different plaintexts. To remediate this issue, users should upgrade to version 3.3.1, 4.0.5 or above.

Details CVE

Score CVSS v3.14.7

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Vecteur d'attaqueLOCAL

ComplexiteHIGH

Privileges requisLOW

Interaction utilisateurNONE

Publie4/20/2026

Derniere modification4/21/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-757

References

https://aws.amazon.com/security/security-bulletins/2026-017-aws/(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://github.com/aws/aws-encryption-sdk-python/releases/tag/v3.3.1(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://github.com/aws/aws-encryption-sdk-python/releases/tag/v4.0.5(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://github.com/aws/aws-encryption-sdk-python/security/advisories/GHSA-v638-38fc-rhfv(ff89ba41-3aa1-4d27-914a-91399e9639e5)

Correlations IOC

Aucune correlation enregistree

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