VDB-370272 · CVE-2026-45783 · GHSA-32mq-hpph-xfvr

libp2p js-libp2p up to 16.2.5 Server Mode stack-based overflow

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6.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in libp2p js-libp2p up to 16.2.5. Affected by this issue is some unknown functionality of the component Server Mode. The manipulation results in stack-based overflow. This vulnerability is reported as CVE-2026-45783. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in libp2p js-libp2p up to 16.2.5. Affected is an unknown function of the component Server Mode. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on availability. CVE summarizes:

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUT_VALUE messages whose keys bypass all content validation. No credentials, no prior relationship, and no protocol deviation beyond a crafted key are required. The victim node's datastore fills until the host disk is exhausted, making the node unavailable. This issue has been patched in version 16.2.6.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-45783 since 05/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

Upgrading to version 16.2.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-36153). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

libp2p

Name

js-libp2p

Version

Website

Product: https://github.com/libp2p/js-libp2p/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: js-libp2p 16.2.6

Timelineinfo

05/13/2026 CVE reserved
06/11/2026 +29 days Advisory disclosed
06/11/2026 +0 days VulDB entry created
06/11/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-32mq-hpph-xfvr
Status: Confirmed

CVE: CVE-2026-45783 (🔒)
GCVE (CVE): GCVE-0-2026-45783
GCVE (VulDB): GCVE-100-370272
EUVD: 🔒

Entryinfo

Created: 06/11/2026 07:41
Updated: 06/11/2026 20:37
Changes: 06/11/2026 07:41 (65), 06/11/2026 20:37 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.