VulnSocial

CVE-2026-49866Disclosure

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronously iterate roughly 180,000 message IDs per 4 MB frame and block the Node.js event loop. This issue is fixed in version 16.0.0.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-770

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-10: 1Technical Details · 2026-07-10: 107-10
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
Full discourse1 post
  • DailyCVE@dailycve
    Disclosure

    🔴 libp2p js-libp2p, CPU DoS via oversized control messages, #CVE-2026-49866 (High) -DC-Jul2026-855 https://dailycve.com/libp2p-js-libp2p-cpu-dos-via-oversized-control-messages-cve-2026-49866-high-dc-jul2026-855/

    Post summary

    A high‑severity CVE-2026-49866 disclosure for a CPU DoS vulnerability in libp2p js-libp2p is presented, providing basic technical data but no PoC, patch, or exploitation evidence.

    0000049
    218 followersView on X

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