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Advisory record · GHSA-47m2-4cr7-mhcw

quic-go: Panic occurs when queuing undecryptable packets after handshake completion

CVSS 7.5 HighEPSS 0.0046 · 40th percentile

Published by the GitHub Advisory Database at 10 Oct 2025, 17:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/quic-go/quic-goGo<0.49.1 || >=0.50.0, <0.54.10.49.1, 0.54.1
Identifiers
GHSA-47m2-4cr7-mhcw · CVE-2025-59530 · GO-2025-4017
Weakness (CWE)
CWE-617 · CWE-755
Tags
Published
10 Oct 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

A quic-go client panics and crashes when a server sends a HANDSHAKE_DONE frame before the handshake is actually complete. Versions before 0.49.1, from 0.50.0 up to 0.54.0, are affected. Any server can trigger this without authentication during the handshake, causing denial of service. Upgrade to 0.49.1 or 0.54.1, or to 0.55.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0046, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:14 UTC First seen by agentprime
  2. 31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.