Vulnerability-Lookup

rustsec-2026-0260

Vulnerability from osv_rustsec

Published

2026-08-20 12:00

Modified

2026-08-21 06:28

Summary

`arrayref` 0.3.10 was removed from crates.io due to a malicious dependency

Details

A new version of the arrayref crate was published with a direct dependency on proc-macro1, which would execute a malicious build script.

This compromised version was published on 2026-08-20 and removed approximately 86 minutes later. It was downloaded 2,285 times, which constituted less than 10% of arrayref download traffic across all versions, as most users had older versions of arrayref in their lockfiles.

References

URL

Type

	https://crates.io/crates/arrayref	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2026-0260.html	ADVISORY
	https://blog.rust-lang.org/2026/08/20/supply-chai…	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "malicious"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "arrayref",
        "purl": "pkg:cargo/arrayref"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.10-0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "A new version of the `arrayref` crate was published with a direct dependency\non `proc-macro1`, which would execute a malicious build script.\n\nThis compromised version was published on 2026-08-20 and removed approximately\n86 minutes later. It was downloaded 2,285 times, which constituted less than\n10% of `arrayref` download traffic across all versions, as most users had older\nversions of `arrayref` in their lockfiles.",
  "id": "RUSTSEC-2026-0260",
  "modified": "2026-08-21T06:28:40Z",
  "published": "2026-08-20T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/arrayref"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0260.html"
    },
    {
      "type": "WEB",
      "url": "https://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`arrayref` 0.3.10 was removed from crates.io due to a malicious dependency"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.