CARGO · AUGUST 2026 · EARLY WARNING

Buffa Rust Crate Vulnerable to Use-After-Free: Early Warning

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.

Severity: HIGH
Affected component: buffa (cargo)
Affected versions: < 0.7.0 or < 0.8.0
Patched version: Not yet available

GHSA-9PWQ-GCRX-WGHH

An early warning has been issued for a high-severity vulnerability in the Buffa Rust crate. This soundness bug in `OwnedView<V>` could allow safe Rust code to trigger a use-after-free, leading to potential memory corruption, information disclosure, and cross-thread misuse.

What happened

An early warning has been issued for a high-severity vulnerability in the Buffa Rust crate. The vulnerability, tracked as GHSA-9PWQ-GCRX-WGHH, is a soundness bug in `OwnedView<V>` that allows safe Rust code to trigger a use-after-free. This can lead to memory corruption, information disclosure, and cross-thread misuse without any `unsafe` code. The vulnerability appears to affect versions of Buffa prior to 0.7.0 or 0.8.0.

The vulnerability was first flagged on 2026-08-28T18:33:58+00:00. It is reportedly not yet exploited in the wild and does not appear to be part of a supply-chain attack. The issue is under investigation, and further details should be consulted from the primary sources.

What to do about it

Update to the latest patched version of Buffa to mitigate the risk.
Check your dependencies for any versions of Buffa prior to 0.7.0 or 0.8.0 and update them.
Monitor the primary sources for updates on the vulnerability and any additional mitigation steps.
Consider implementing additional security measures to protect against potential memory corruption and information disclosure.

How 0Day would have caught this

MATCHED TO YOUR ACTUAL DEPENDENCY GRAPH0Day matches every incoming threat signal against your GitHub organization’s full dependency graph, including transitive dependencies. If buffa is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.

Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.

Frequently asked questions

Am I affected?

You are reportedly affected if you are using versions of Buffa prior to 0.7.0 or 0.8.0.

What should I do right now?

Update to the latest patched version of Buffa and check your dependencies for any affected versions.

Has this been exploited in the wild?

The vulnerability is reportedly not yet exploited in the wild.

What is the severity of this vulnerability?

The severity of this vulnerability is high.

Sources

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