Missing Release of Resource after Effective Lifetime Affecting @libp2p/circuit-relay-v2 package, versions >=2.1.5 <4.2.9
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-LIBP2PCIRCUITRELAYV2-19256805
- published25 Aug 2026
- disclosed24 Aug 2026
- creditAlleysira
Introduced: 24 Aug 2026
NewCVE-2026-77384 (opens in a new tab)How to fix?
Upgrade @libp2p/circuit-relay-v2 to version 4.2.9 or higher.
Overview
@libp2p/circuit-relay-v2 is an Implementation of Circuit Relay v2
Affected versions of this package are vulnerable to Missing Release of Resource after Effective Lifetime through the reserve() path in packages/transport-circuit-relay-v2/src/server/reservation-store.ts. An attacker can grow memory usage and eventually trigger an out-of-memory failure by repeatedly sending valid RESERVE refresh requests for the same relay reservation. The reservation store reuses the same abort signal when a reservation is refreshed, but it still registers a new abort listener on each successful refresh. A peer that can reserve on a public relay can keep one reservation entry alive while accumulating unbounded listeners and closure state, causing sustained heap growth and service degradation.