Use After Free Affecting node package, versions [22.0.0, 22.23.2)[24.0.0, 24.18.1)[26.0.0, 26.5.1)
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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- published6 Aug 2026
- disclosed4 Aug 2026
- credithahahkim
Introduced: 4 Aug 2026
NewCVE-2026-56848 (opens in a new tab)How to fix?
Upgrade node to version 22.23.2, 24.18.1, 26.5.1 or higher.
Overview
node is a JavaScript runtime built on Chrome's V8 JavaScript engine.
Affected versions of this package are vulnerable to Use After Free in the HTTP/2 handling process when nghttp2_session_mem_send() is called re-entrantly during the execution of nghttp2_session_mem_recv(). An attacker can cause a heap-use-after-free condition by triggering concurrent or re-entrant calls, potentially leading to denial of service or other unpredictable behavior.