CVE-2026-34062

Name: CVE-2026-34062
Creator: NVD / NIST
Published: 2026-04-22T20:16:40.53+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2026-34062 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. nimiq-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, `MessageCodec::read_request` and `read_response` call `read_to_end()` on inbound substreams, so a remote peer can send only a partial frame and keep the substream open. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

Description

nimiq-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, `MessageCodec::read_request` and `read_response` call `read_to_end()` on inbound substreams, so a remote peer can send only a partial frame and keep the substream open. because `Behaviour::new` also sets `with_max_concurrent_streams(1000)`, the node exposes a much larger stalled-slot budget than the library default. The patch for this vulnerability is formally released as part of v1.3.0. No known workarounds are available.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Probability

0.30%

21.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Nimiq	Nimiq Proof-Of-Stake	< 1.3.0

References

https://github.com/nimiq/core-rs-albatross/commit/c021a5337b808c73571b44999f9753051bac7508Patch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0Release Notes
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gh7r-qh4p-q4frPatch, Vendor Advisory

Timeline

Published: Apr 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34062?

How severe is CVE-2026-34062?

CVE-2026-34062 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34062?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34062?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST