CVE-2026-50139: goshs: Share-link ?token=… redemption races past download limit

July 1, 2026

ShareHandler reads the share token’s DownloadLimit under RLock, releases the lock, serves the file, then re-acquires the lock to increment the counter. Concurrent requests all read the same Downloaded/DownloadLimit snapshot, all pass the check, and all are served — exceeding the operator’s intended cap.

References

github.com/advisories/GHSA-j48m-h7xq-2xpj
github.com/patrickhener/goshs/security/advisories/GHSA-j48m-h7xq-2xpj
nvd.nist.gov/vuln/detail/CVE-2026-50139

Code Behaviors & Features

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