CVE-2026-89090
Published:September 11, 2026
Updated:September 22, 2026
An unrecovered panic in the event stream header decoder in Amazon AWS SDK for Go v2 before release-2026-03-23 might allow an unauthenticated remote actor to terminate the consuming application process via a crafted event stream response frame containing a header value type outside the valid range.
To remediate this issue, users should upgrade to release-2026-03-23 or later, and patch any forked or derivative code.
Affected Packages
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream (GO):
Affected version(s) >=v1.0.0 <v1.7.8Fix Suggestion:
Update to version v1.7.8github.com/aws/aws-sdk-go-v2/service/s3 (GO):
Affected version(s) >=v0.1.0 <v1.97.3Fix Suggestion:
Update to version v1.97.3github.com/aws/aws-sdk-go-v2/service/bedrockruntime (GO):
Affected version(s) >=v1.0.0 <v1.50.4Fix Suggestion:
Update to version v1.50.4github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime (GO):
Affected version(s) >=v1.0.0 <v1.51.8Fix Suggestion:
Update to version v1.51.8github.com/aws/aws-sdk-go-v2/service/transcribestreaming (GO):
Affected version(s) >=v1.0.0 <v1.34.5Fix Suggestion:
Update to version v1.34.5github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs (GO):
Affected version(s) >=v0.1.0 <v1.65.0Fix Suggestion:
Update to version v1.65.0github.com/aws/aws-sdk-go-v2/service/lexruntimev2 (GO):
Affected version(s) >=v1.0.0 <v1.35.15Fix Suggestion:
Update to version v1.35.15github.com/aws/aws-sdk-go-v2/service/bedrockagentcore (GO):
Affected version(s) >=v1.0.0 <v1.15.2Fix Suggestion:
Update to version v1.15.2github.com/aws/aws-sdk-go-v2/service/iotsitewise (GO):
Affected version(s) >=v0.1.0 <v1.52.19Fix Suggestion:
Update to version v1.52.19github.com/aws/aws-sdk-go-v2/service/lambda (GO):
Affected version(s) >=v0.1.0 <v1.88.5Fix Suggestion:
Update to version v1.88.5github.com/aws/aws-sdk-go-v2/service/kinesis (GO):
Affected version(s) >=v0.1.0 <v1.43.5Fix Suggestion:
Update to version v1.43.5github.com/aws/aws-sdk-go-v2/service/sagemakerruntime (GO):
Affected version(s) >=v0.1.0 <v1.39.6Fix Suggestion:
Update to version v1.39.6Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncaught Exception
EPSS
Base Score:
0.31