CVE-2026-77650
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductDroundy Append-only-vec
PublishedAug 21, 2026
First seenAug 21, 2026
Weakness typeCWE-506CWE-506
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| droundy append-only-vec | 0.1.9 | — |
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