GHSA-xmrv-pmrh-hhx2
MEDIUMDenial of Service due to Panic in AWS SDK for Go v2 SDK EventStream Decoder
Blast Radius
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream🐹github.com/aws/aws-sdk-go-v2/service/bedrockagentcore🐹github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime🐹github.com/aws/aws-sdk-go-v2/service/bedrockruntime🐹github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs🐹github.com/aws/aws-sdk-go-v2/service/iotsitewise🐹github.com/aws/aws-sdk-go-v2/service/kinesis🐹github.com/aws/aws-sdk-go-v2/service/lambda+4 moreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
CVSSv3.1 Rating: [Medium] CVSSv3.1 Score: [5.9] CVSSv3.1 Vector String: [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H]
Summary and Impact
An issue exists in the the EventStream header decoder in AWS SDK for Go v2 in versions predating 2026-03-23. An actor can send a malformed EventStream response frame containing a crafted header value type byte outside the valid range, which can cause the host process to terminate.
Impacted versions: < 2026-03-23
Patches
This issue has been addressed in versions 2026-03-23 and above. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.
Workarounds
Not Applicable
References
If you have any questions or comments about this advisory, we ask that you contact [AWS/Amazon] Security via our vulnerability reporting page or directly via email to [email protected]. Please do not create a public GitHub issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream | all versions | 1.7.8 |
| 🐹Go | github.com/aws/aws-sdk-go-v2/service/bedrockagentcore | all versions | 1.15.2 |
| 🐹Go | github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime | all versions | 1.51.8 |
| 🐹Go | github.com/aws/aws-sdk-go-v2/service/bedrockruntime | all versions | 1.50.4 |
| 🐹Go | github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs | all versions | 1.65.0 |
| 🐹Go | github.com/aws/aws-sdk-go-v2/service/iotsitewise | all versions | 1.52.19 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream to 1.7.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xmrv-pmrh-hhx2 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-xmrv-pmrh-hhx2 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-xmrv-pmrh-hhx2. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-xmrv-pmrh-hhx2 in your dependencies?
O3 detects GHSA-xmrv-pmrh-hhx2 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.