RUSTSEC-2026-0266 `internment` 0.8.7 was removed from crates.io due to a malicious dependency
A malicious dependency in the internment crate allowed arbitrary code execution during build, requiring users to upgrade to a safe version.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is RUSTSEC-2026-0266?
RUSTSEC-2026-0266 is a vulnerability in internment, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A new version of the internment 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 90 minutes later.
The compromised 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.
Which versions are affected by RUSTSEC-2026-0266?
1 open source package ship an affected version, including internment.
| Package | Affected | Fixed in |
|---|---|---|
internment crates.io | From 0.8.7-0 | None |
How do I fix RUSTSEC-2026-0266?
No fix has been published for RUSTSEC-2026-0266 yet. Limit exposure of the affected software until one is available.
Is RUSTSEC-2026-0266 being exploited?
There is no known exploitation of RUSTSEC-2026-0266 in the wild and no public exploit code.