CVE-2026-89090: Denial of service in the event stream header decoder in AWS SDK for Go v2
Noroxi assessment
Priority: Monitor (action score 32/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.30% (FIRST EPSS).
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream (Go) 1.7.8; github.com/aws/aws-sdk-go-v2/service/bedrockagentcore (Go) 1.15.2; github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime (Go) 1.51.8.
- Severity is disputed: the assigning authority (CNA) scores it 5.9, NVD 8.2.
Low priority for now. Upgrade to github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream (Go) 1.7.8; github.com/aws/aws-sdk-go-v2/service/bedrockagentcore (Go) 1.15.2; github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime (Go) 1.51.8 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- EUVD-2026-76157
- GHSA-xmrv-pmrh-hhx2
- GO-2026-5764
- openSUSE-SU-2026:11803-1
- openSUSE-SU-2026:11821-1
- openSUSE-SU-2026:12107-1
- openSUSE-SU-2026:12186-1
- openSUSE-SU-2026:12208-1
- openSUSE-SU-2026:21925-1
- openSUSE-SU-2026:22032-1
- openSUSE-SU-2026:22145-1
- SUSE-SU-2026:24148-1
- SUSE-SU-2026:24265-1
- SUSE-SU-2026:4408-1
- Published
- Sep 11, 2026
- Updated
- Sep 24, 2026
- EPSS
- 0.3% · 23th percentile
- CWE
- CWE-248
Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · AMZN
- 5.9
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (AMZN). Independent of NVD's CPE analysis and usually ahead of it.
AWS AWS SDK for Go v2
- before 2026-03-23affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Go | github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream | before 1.7.8 | 1.7.8 |
| Go | github.com/aws/aws-sdk-go-v2/service/bedrockagentcore | before 1.15.2 | 1.15.2 |
| Go | github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime | before 1.51.8 | 1.51.8 |
| Go | github.com/aws/aws-sdk-go-v2/service/bedrockruntime | before 1.50.4 | 1.50.4 |
| Go | github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs | before 1.65.0 | 1.65.0 |
| Go | github.com/aws/aws-sdk-go-v2/service/iotsitewise | before 1.52.19 | 1.52.19 |
| Go | github.com/aws/aws-sdk-go-v2/service/kinesis | before 1.43.5 | 1.43.5 |
| Go | github.com/aws/aws-sdk-go-v2/service/lambda | before 1.88.5 | 1.88.5 |
| Go | github.com/aws/aws-sdk-go-v2/service/lexruntimev2 | before 1.35.15 | 1.35.15 |
| Go | github.com/aws/aws-sdk-go-v2/service/s3 | before 1.97.3 | 1.97.3 |
| Go | github.com/aws/aws-sdk-go-v2/service/sagemakerruntime | before 1.39.6 | 1.39.6 |
| Go | github.com/aws/aws-sdk-go-v2/service/transcribestreaming | before 1.34.5 | 1.34.5 |
| openSUSE:Leap 16.0 | alloy | before 1.19.2-160000.1.1 | 1.19.2-160000.1.1 |
| openSUSE:Leap 16.0 | amazon-ecs-init | before 1.108.0-160000.1.1 | 1.108.0-160000.1.1 |
| openSUSE:Leap 16.0 | keybase-client | before 6.6.3-bp160.4.1 | 6.6.3-bp160.4.1 |
| openSUSE:Tumbleweed | alloy | before 1.19.2-1.1 | 1.19.2-1.1 |
| openSUSE:Tumbleweed | amazon-cloudwatch-agent | before 1.300073.0-3.1 | 1.300073.0-3.1 |
| openSUSE:Tumbleweed | amazon-ecs-init | before 1.108.0-1.1 | 1.108.0-1.1 |
| openSUSE:Tumbleweed | keybase-client | before 6.6.3-5.1 | 6.6.3-5.1 |
| openSUSE:Tumbleweed | rqlite | before 10.6.1-1.1 | 10.6.1-1.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | alloy | before 1.19.2-150700.15.29.1 | 1.19.2-150700.15.29.1 |
| SUSE:Linux Enterprise Server 16.0 | alloy | before 1.19.2-160000.1.1 | 1.19.2-160000.1.1 |
| SUSE:Linux Enterprise Server 16.0 | amazon-ecs-init | before 1.108.0-160000.1.1 | 1.108.0-160000.1.1 |
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Go:github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream | 1.7.8 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/bedrockagentcore | 1.15.2 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime | 1.51.8 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/bedrockruntime | 1.50.4 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs | 1.65.0 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/iotsitewise | 1.52.19 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/kinesis | 1.43.5 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/lambda | 1.88.5 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/lexruntimev2 | 1.35.15 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/s3 | 1.97.3 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/sagemakerruntime | 1.39.6 | Package registry (OSV) |
| Go:github.com/aws/aws-sdk-go-v2/service/transcribestreaming | 1.34.5 | Package registry (OSV) |
| opensuse:alloy | 1.19.2-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:amazon-cloudwatch-agent | 1.300073.0-3.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:amazon-ecs-init | 1.108.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:keybase-client | 6.6.3-5.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:rqlite | 10.6.1-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:alloy | 1.19.2-150700.15.29.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:alloy | 1.19.2-160000.1.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:amazon-ecs-init | 1.108.0-160000.1.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- 1Sealfinder
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-248 · Uncaught ExceptionCVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
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References
Show all references (2 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.