Reachable Assertion 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-22467987
- published12 Nov 2026
- disclosed11 Nov 2026
- creditChris Rohlf
Introduced: 11 Nov 2026
NewCVE-2026-123863 (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 Reachable Assertion due to a reachable assertion in ~Http2Session() during HTTP/2 session teardown. An attacker can crash the server process by sending HTTP/2 requests that leave a stream holding nghttp2-allocated header buffers after its session is destroyed, which fails the CHECK_EQ(current_nghttp2_memory_, 0) assertion. Only servers that use the http2 module and respond before the request body has ended are affected.
This vulnerability is a bypass of the fix for CVE-2024-27983.