CVE-2026-37236
Public on 2026-08-28
Modified on 2026-09-01
Description
grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | amazon-cloudwatch-agent | Not Affected | ||
| Amazon Linux 2023 | amazon-cloudwatch-agent | Not Affected | ||
| Amazon Linux 2027 Preview | amazon-cloudwatch-agent | Not Affected | ||
| Amazon Linux 2 - Aws-nitro-enclaves-cli Extra | containerd | Not Affected | ||
| Amazon Linux 2 - Docker Extra | containerd | Not Affected | ||
| Amazon Linux 2 - Ecs Extra | containerd | Not Affected | ||
| Amazon Linux 2023 | containerd | Not Affected | ||
| Amazon Linux 2027 Preview | containerd | Not Affected | ||
| Amazon Linux 2 - Core | cri-tools | Not Affected | ||
| Amazon Linux 2 - Aws-nitro-enclaves-cli Extra | docker | Not Affected | ||
| Amazon Linux 2 - Docker Extra | docker | Not Affected | ||
| Amazon Linux 2 - Ecs Extra | docker | Not Affected | ||
| Amazon Linux 2023 | docker | Not Affected | ||
| Amazon Linux 2027 Preview | docker | Not Affected | ||
| Amazon Linux 2 - Docker Extra | runfinch-finch | Not Affected | ||
| Amazon Linux 2023 | runfinch-finch | Not Affected | ||
| Amazon Linux 2027 Preview | runfinch-finch | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |