CVE-2025-59530: GO-2025-4017 - Panic occurs when queuing undecryptable packets after handshake completion in github.com/quic-go/quic-go

CVE-2025-59530 · Severity: low · CVSS 3.1 · Published 2025-11-05

Panic occurs when queuing undecryptable packets after handshake completion in github.com/quic-go/quic-go

Technologies: github.com/quic-go/quic-go (Go). Vendors: Go.

Quick answers

Is CVE-2025-59530 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-59530 being exploited in the wild.
How severe is CVE-2025-59530?
Low severity, with a CVSS score of 3.1, published 5 November 2025.
Which products and versions are affected?
github.com/quic-go/quic-go (Go) SEMVER:introduced=0,fixed=0.49.1, SEMVER:introduced=0,fixed=0.49.1,introduced=0.50.0,fixed=0.54.1.
Is there a fix for CVE-2025-59530?
Yes. github.com/quic-go/quic-go (Go): upgrade to 0.49.1, 0.54.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-59530?
Check whether you run github.com/quic-go/quic-go (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/quic-go/quic-go (Go): upgrade to 0.49.1, 0.54.1 or later
    go get github.com/quic-go/quic-go@v0.54.1

Affected products

  • github.com/quic-go/quic-go (Go) SEMVER:introduced=0,fixed=0.49.1, SEMVER:introduced=0,fixed=0.49.1,introduced=0.50.0,fixed=0.54.1

Identifiers

  • CVE-2025-59530
  • GHSA-47m2-4cr7-mhcw
  • GO-2025-4017

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