CVE-2026-56864
Published: August 18, 2026Last modified: August 26, 2026
Description
A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | NONE |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | go | Fixed (1.25.14-r0) |
| 25 LTS | go | Fixed (1.25.14-r0) | |
| Stream | go | Fixed (1.26.7-r0) | |
| Hardened Containers | 23 LTS | go | Fixed (1.25.14-r0) |
| 25 LTS | go | Fixed (1.25.14-r0) | |
| Stream | go | Fixed (1.26.7-r0) |