CVE-2026-3336
PKCS7_verify Certificate Chain Validation Bypass in AWS-LC
Description
Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer. Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:HIntegrityHigh
A:NAvailabilityNone
Weaknesses
Affected Products
amazon
commercial·US
AWS
commercial·US
Exploitability
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
1 technique Collection
References
https://aws.amazon.com/security/security-bulletins/2026-005-AWS/
aws.amazon.com
https://github.com/aws/aws-lc/releases/tag/v1.69.0
github.com
https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp
github.com
and 4 more references View all →
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