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Vulnerability record · public intelligence
CVE-2026-56864
HIGH
Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb
Published Aug 13, 2026 · Updated Oct 23, 2026 · Also known as BIT-golang-2026-56864, GO-2026-6180
Severity · CVSSHIGH · 7.5
Known exploitationNot listed
EPSS / likelihood0.30%
QFinch risk score10 / 100
Original summary
Normalized public record · Updated Oct 23, 2026
Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
CVENVDOSVEPSS
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- BIT-golang-2026-56864, GO-2026-6180
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Aug 13, 2026 · Last refreshed Oct 23, 2026