CVE-2026-89090
Medium
Description
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductGithub.com/aws/aws-sdk-go-v2/aws/protocol/eventstream
PublishedSep 11, 2026
First seenSep 11, 2026
Weakness typeCWE-248CWE-248
How to fix
Update
- github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream1.7.8 or later
- github.com/aws/aws-sdk-go-v2/service/bedrockagentcore1.15.2 or later
- github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime1.51.8 or later
- github.com/aws/aws-sdk-go-v2/service/bedrockruntime1.50.4 or later
- github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs1.65.0 or later
- github.com/aws/aws-sdk-go-v2/service/iotsitewise1.52.19 or later
- github.com/aws/aws-sdk-go-v2/service/kinesis1.43.5 or later
- github.com/aws/aws-sdk-go-v2/service/lambda1.88.5 or later
- github.com/aws/aws-sdk-go-v2/service/lexruntimev21.35.15 or later
- github.com/aws/aws-sdk-go-v2/service/s31.97.3 or later
- github.com/aws/aws-sdk-go-v2/service/sagemakerruntime1.39.6 or later
- github.com/aws/aws-sdk-go-v2/service/transcribestreaming1.34.5 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/aws/aws-sdk-go-v2/aws/protocol/eventstreamGo | v < 1.7.8 | 1.7.8 |
| github.com/aws/aws-sdk-go-v2/service/bedrockagentcoreGo | v < 1.15.2 | 1.15.2 |
| github.com/aws/aws-sdk-go-v2/service/bedrockagentruntimeGo | v < 1.51.8 | 1.51.8 |
| github.com/aws/aws-sdk-go-v2/service/bedrockruntimeGo | v < 1.50.4 | 1.50.4 |
| github.com/aws/aws-sdk-go-v2/service/cloudwatchlogsGo | v < 1.65.0 | 1.65.0 |
| github.com/aws/aws-sdk-go-v2/service/iotsitewiseGo | v < 1.52.19 | 1.52.19 |
| github.com/aws/aws-sdk-go-v2/service/kinesisGo | v < 1.43.5 | 1.43.5 |
| github.com/aws/aws-sdk-go-v2/service/lambdaGo | v < 1.88.5 | 1.88.5 |
| github.com/aws/aws-sdk-go-v2/service/lexruntimev2Go | v < 1.35.15 | 1.35.15 |
| github.com/aws/aws-sdk-go-v2/service/s3Go | v < 1.97.3 | 1.97.3 |
| github.com/aws/aws-sdk-go-v2/service/sagemakerruntimeGo | v < 1.39.6 | 1.39.6 |
| github.com/aws/aws-sdk-go-v2/service/transcribestreamingGo | v < 1.34.5 | 1.34.5 |
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