CLEANSTART-2026-MP78954

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Import Source
https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-MP78954.json
JSON Data
https://api.osv.dev/v1/vulns/CLEANSTART-2026-MP78954
Upstream
  • CVE-2026-56865
Published
2026-09-30T20:20:08Z
Modified
2026-10-01T03:00:07Z
Severity
  • 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go ...
Details

CVE-2026-56865 affects multiple packages. A malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go module cache. See references for individual vulnerability details.

References

Affected packages

CleanStart / alertmanager

Package

Name
alertmanager

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.34.0-r1

Database specific

source
"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-MP78954.json"

CleanStart / cosign

Package

Name
cosign

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.5.3-r1

Database specific

source
"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-MP78954.json"