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CVE-2025-64508

7.5 · HIGH

Bugsink is a self-hosted error tracking tool.

Published Nov 10, 2025CWE-770EPSS 0.51%

Overview

CVE-2025-64508 is a high-severity vulnerability. It was published on November 10, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Bugsink is a self-hosted error tracking tool. In versions prior to 2.0.5, brotli "bombs" (highly compressed brotli streams, such as many zeros) can be sent to the server. Since the server will attempt to decompress these streams before applying various maximums, this can lead to exhaustion of the available memory and thus a Denial of Service. This can be done if the `DSN` is known, which it is in many common setups (JavaScript, Mobile Apps). The issue is patched in Bugsink version `2.0.5`. The vulnerability is similar to, but distinct from, another brotli-related problem in Bugsink, GHSA-rrx3-2x4g-mq2h/CVE-2025-64509.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/bugsink/bugsink/commit/3f65544aab3ad5303d97009136640de97b0676a5GitHubgithub.com/bugsink/bugsink/pull/266GitHubgithub.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269vGitHubgithub.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627GitHubgithub.com/google/brotli/issues/1327GitHubgithub.com/google/brotli/issues/1375GitHubgithub.com/google/brotli/pull/1234GitHubgithub.com/google/brotli/releases/tag/v1.2.0

How CyberStrike helps

Frequently asked questions

What is CVE-2025-64508?

CVE-2025-64508 is a high-severity vulnerability. It was published on November 10, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-64508?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-64508?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-64508?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-64508 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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