CVE-2025-64509: PYSEC-2026-1227 - Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)

CVE-2025-64509 · Severity: low · CVSS 3.1 · Published 2026-07-07

Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)

Technologies: bugsink (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-64509 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-64509 being exploited in the wild.
How severe is CVE-2025-64509?
Low severity, with a CVSS score of 3.1, published 7 July 2026.
Which products and versions are affected?
bugsink (PyPI) ECOSYSTEM:introduced=0,fixed=2.0.6.
Is there a fix for CVE-2025-64509?
Yes. bugsink (PyPI): upgrade to 2.0.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-64509?
Check whether you run bugsink (PyPI) 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

  • bugsink (PyPI): upgrade to 2.0.6 or later
    pip install "bugsink>=2.0.6"

Affected products

  • bugsink (PyPI) ECOSYSTEM:introduced=0,fixed=2.0.6

Identifiers

  • CVE-2025-64509
  • GHSA-rrx3-2x4g-mq2h
  • PYSEC-2026-1227

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.