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  4. CVE 2026 77384 libp2p circuit relay v2 server reservation
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Back to active CVEs
High · CVSS 7.5CVE-2026-77384

libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustionCVE-2026-77384

Answer in brief

CVE-2026-77384 records a High severity (CVSS 7.5) vulnerability in libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion. The current sources do not mark it as known exploited. The current feed maps libp2p/js-libp2p (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 24, 2026Updated Sep 9, 2026Source checked Oct 9, 2026First seen by HOL Aug 24, 2026Material review Sep 9, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps libp2p/js-libp2p (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
libp2p/js-libp2pgeneric>=2.1.5 <4.2.94.2.9

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for libp2p/js-libp2p.
  2. 2Review the reported fix. Update libp2p/js-libp2p to 4.2.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 24, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

libp2p is a JavaScript implementation of the libp2p networking stack. Prior to version 4.2.9, the reservation refresh path in reservation-store.ts reuses the same retimeableSignal but unconditionally registers another abort listener on every refresh. As a result, a remote peer can repeatedly send valid RESERVE requests for the same reservation, causing unbounded listener and closure growth in @libp2p/circuit-relay-v2 relay servers and leading to denial of service. This issue is fixed in version 4.2.9.

Quoted source text, attributed separately from HOL analysis.

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  • Predictable Media Stream Pre-Shared Key Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Eog: eog: arbitrary code execution via heap buffer overflow in png metadata readerSame generic ecosystem
  • fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgerySame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-400, CWE-772
Source
CVE List V5
Source checked
Oct 9, 2026
References
3 linked sources
Open source record