Skip to content
Fencer Intel
no cvss —

RUSTSEC-2026-0264 json

`proc-macro-en` was removed from crates.io due to malicious code

published 2mo ago modified 2mo ago

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

We identified that `proc-macro-en` contained the same build script as `proc-macro1` and it was part of the same supply chain attack.

This crate had one single version published at 2026-08-20. The crate was removed from crates.io and related user account was locked.

This crate was used as part of a malware campaign targeted at users of `arrayref`, which was downloaded 2,285 times before being removed; see [the `arrayref` advisory][arrayref-advisory] for more detail.

[arrayref-advisory]: https://rustsec.org/advisories/RUSTSEC-2026-0260.html

Is RUSTSEC-2026-0264 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Affected packages

ecosystem package affected fixed in
crates.io proc-macro-en
>=0.0.0-0
 no fix listed

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.