Use After Free Affecting nodejs package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-NODEJS-22472484
- published12 Nov 2026
- disclosed11 Nov 2026
- creditUnknown
Introduced: 11 Nov 2026
NewCVE-2026-123866 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Use After Free in HTTP/2 stream teardown, where the response buffer is freed but a reference to it is still used when the stream is torn down during a backpressured write. An attacker can read freed or unrelated heap memory, including other connections' response buffers, by resetting a stream with RST_STREAM while a write to it is pending, so that the memory is written to the socket in place of the intended response. On versions from 24.22.0 and 26.9.0 a peer can trigger the teardown remotely, and on all affected lines it also requires a server-side teardown, such as a per-stream idle timeout.