RUSTSEC-2026-0016
`polymarkets-rs-clob-client` was removed from crates.io for malicious code
This is part of an ongoing campaign to attempt to typosquat crates in the
polymarket-client-sdk
ecosystem to exfiltrate user credentials.
The malicious crate had 1 version published on 2026-02-19 approximately 20 hours before removal and had no evidence of actual downloads. There were no crates depending on this crate on crates.io.
Thanks to Adam Harvey at the Rust Foundation, who is awkwardly thanking himself in this instance.
The crates.io team advises anyone developing with Polymarket to review dependencies carefully. We are investigating ways to mitigate this attacker who appears to be very motivated to steal Polymarket credentials.
What each source reports
OSVNo score
`polymarkets-rs-clob-client` was removed from crates.io for malicious code
This is part of an ongoing campaign to attempt to typosquat crates in the
polymarket-client-sdk
ecosystem to exfiltrate user credentials.
The malicious crate had 1 version published on 2026-02-19 approximately 20 hours before removal and had no evidence of actual downloads. There were no crates depending on this crate on crates.io.
Thanks to Adam Harvey at the Rust Foundation, who is awkwardly thanking himself in this instance.
The crates.io team advises anyone developing with Polymarket to review dependencies carefully. We are investigating ways to mitigate this attacker who appears to be very motivated to steal Polymarket credentials.
- Record
RUSTSEC-2026-0016- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
polymarkets-rs-clob-clientcrates.io | 0.0.0-0 and later | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
RUSTSEC-2026-0016 is a vulnerability with no CVSS score yet in polymarkets-rs-clob-client, published February 20, 2026. No source lists public exploit code. No source names a fixed version.