CVE-2025-23020

5.3 mediumEPSS 0.6%

Medium (5.3). EPSS 0.6% chance of exploitation in the next 30 days. Fixed in tech.kwik:kwik 0.10.1.

An issue was discovered in Kwik before 0.10.1. A hash collision vulnerability (in the hash table used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs).

Severity

CVSS 3.1

5.3 medium

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWE: CWE-407
Published: 2025-02-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-9f57-9rhg-4hvm	Maven	tech.kwik:kwik	<0.10.1	0.10.1

References

https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
https://github.com/ptrd/kwik/releases/tag/v0.10.1

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