RUSTSEC-2026-0221

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0221

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0221.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0221

Published

2026-07-13T12:00:00Z

Modified

2026-07-31T12:15:04.629484145Z

Summary

`event-listener` allows `!Send` tags to cross thread boundaries via `StackSlot`

Details

Affected versions of event-listener unconditionally implement Send and Sync for StackSlot<'_, T>, the stack-allocated listener type created by the listener! macro.

This allows a !Send tag type set via Event::with_tag to be moved to another thread and accessed via StackSlot::wait, causing a data race in safe code.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / event-listener

Package

Name: event-listener; View open source insights on deps.dev
Purl: pkg:cargo/event-listener

Affected ranges

Type: SEMVER
Events: Introduced

5.1.0

Fixed

5.4.2

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "functions": [],
        "os": [],
        "arch": []
    }
}

Database specific

source

"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0221.json"

informational

"unsound"

cvss

null