CVE-2026-77651
Malicious Rust crate dependency enables arbitrary code execution during compilation.
Is CVE-2026-77651 being exploited?
Not confirmed. CVE-2026-77651 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.45% probability of exploitation in the next 30 days.
How severe is CVE-2026-77651?
CVE-2026-77651 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-77651?
Yes. A fix has been recorded for CVE-2026-77651. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77651 affect?
CVE-2026-77651 affects Rust projects using arrayref 0.3.10, Developer workstations, CI/CD build runners, Artifact repositories. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77651?
Stop builds using arrayref 0.3.10, remove/update dependency, audit builds and rotate secrets.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Compiling projects with arrayref 0.3.10 can run attacker-controlled code via a rogue dependency, compromising developer machines, CI/CD, and secrets.
Immediate action required
- affected0.3.10
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.