RUSTSEC-2026-0262
`append-only-vec` 0.1.9 was removed from crates.io due to a malicious dependency
A new version of the append-only-vec crate was published with a direct dependency
on proc-macro1, which would execute a malicious build script.
The compromised version of this crate was published on 2026-08-20, and was removed approximately 107 minutes later.
The compromised crate version 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 for more detail.
What each source reports
OSV No score
`append-only-vec` 0.1.9 was removed from crates.io due to a malicious dependency
A new version of the append-only-vec crate was published with a direct dependency
on proc-macro1, which would execute a malicious build script.
The compromised version of this crate was published on 2026-08-20, and was removed approximately 107 minutes later.
The compromised crate version 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 for more detail.
- Record
RUSTSEC-2026-0262- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
append-only-veccrates.io |
0.1.9 up to 0.1.10-0 | 0.1.10-0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
RUSTSEC-2026-0262 is a vulnerability with no CVSS score yet in append-only-vec, published August 20, 2026. No source lists public exploit code. Fixed in append-only-vec 0.1.10-0.