Reachable Assertion Affecting nghttp2/nghttp2 package, versions [,1.68.1)
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-UNMANAGED-NGHTTP2NGHTTP2-15842855
- published30 Mar 2026
- disclosed18 Mar 2026
- creditAndrew MacPherson
Introduced: 18 Mar 2026
CVE-2026-27135 (opens in a new tab)How to fix?
Upgrade nghttp2/nghttp2 to version 1.68.1 or higher.
Overview
Affected versions of this package are vulnerable to Reachable Assertion due to missing internal state validation after the nghttp2_session_terminate_session or nghttp2_session_terminate_session2 APIs are called. An attacker can cause the application to terminate unexpectedly by sending a malformed frame that triggers an assertion failure.