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Vulnerabilities CVE-2026-56864

CVE-2026-56864

None
Open
TLP:CLEAR

Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb

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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

Details

Confidence
90%
Published
Aug 13, 2026
Last Modified
Aug 13, 2026
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