# CVE-2025-64508: PYSEC-2026-1225 - Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input

Source: https://junglewise.ai/threats/cve-2025-64508-bugsink-is-vulnerable-to-unauthenticated-remote-dos-via-crafted  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-07  
License: CC BY 4.0 with a link back

CVE-2025-64508 · Severity: low · CVSS 3.1 · Published 2026-07-07

Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input

Technologies: [bugsink (PyPI)](https://junglewise.ai/threats/technologies/pypi-bugsink). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-64508 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-64508 being exploited in the wild.

**How severe is CVE-2025-64508?** 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=2.0.5.

**Is there a fix for CVE-2025-64508?** Yes. bugsink (PyPI): upgrade to 2.0.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-64508?** 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 2.0.5 or later

  ```sh
  pip install "bugsink>=2.0.5"
  ```


## Affected products

- bugsink (PyPI) ECOSYSTEM:introduced=0,fixed=2.0.5

## Identifiers

- CVE-2025-64508
- GHSA-fc2v-vcwj-269v
- PYSEC-2026-1225

## Related threats

- [Bugsink denial of service via excessive event tags](https://junglewise.ai/threats/cve-2026-53954-bugsink-denial-of-service-via-excessive-event-tags)
- [PYSEC-2026-1227 - Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)](https://junglewise.ai/threats/cve-2025-64509-bugsink-is-vulnerable-to-unauthenticated-remote-dos-via-crafted)
- [PYSEC-2026-1226 - Bugsink path traversal via event_id in ingestion](https://junglewise.ai/threats/cve-2025-54433-bugsink-path-traversal-via-event-id-in-ingestion)
- [Bugsink missing project scoping in sourcemap and debug file lookup](https://junglewise.ai/threats/cve-2026-47728-bugsink-missing-project-scoping-in-sourcemap-and-debug-file)
- [Bugsink authorization bypass in issue list bulk actions](https://junglewise.ai/threats/cve-2026-47716-bugsink-authorization-bypass-in-issue-list-bulk-actions)