CVE-2026-77650

Supply Chain Attack via Rogue Dependency in append‑only‑vec Crate

Published Aug 21, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
The append-only-vec crate 0.1.9 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 server to offer arbitrary code execution.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Droundy
Droundy append-only-vec
Vendors & Products Droundy
Droundy append-only-vec
Type Values Removed Values Added
Title Supply Chain Attack via Rogue Dependency in append‑only‑vec Crate
Type Values Removed Values Added
Description The append-only-vec crate 0.1.9 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 server to offer arbitrary code execution.
Weaknesses CWE-506
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 21, 2026, 1:20 PM
Reserved
Aug 21, 2026, 12:40 AM
Status
Deferred
Published
Aug 21, 2026, 1:17 AM
Modified
Oct 18, 2026, 8:10 PM