01 Record

CVE-2026-77651

The arrayref crate 0.3.10 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control

CriticalPUBLISHEDCNA: mitre

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

The arrayref crate 0.3.10 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.80% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 56.3% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-10-18.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-08-21 00:41Z2 MO AGO

Last updated

2026-08-21 13:17Z2 MO AGO

Reserved

2026-08-21

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-506Embedded Malicious CodeClass

Data version

5.2

Document digest

1b8c776133a6b19b18c6902dd4fa72c2fab7bda52976bb58374487d3b2db70e1

05 Affected products

VendorProductVersionsPlatforms

droundyarrayref0.3.10—

06 References

blog.rust-lang.orghttps://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref
github.comhttps://github.com/rustsec/advisory-db/issues/3161
www.stepsecurity.iohttps://www.stepsecurity.io/blog/arrayref-rust-crate-supply-chain-attack
safedep.iohttps://safedep.io/arrayref-proc-macro1-rust-build-time-malware/
rustsec.orghttps://rustsec.org/advisories/RUSTSEC-2026-0260.html