CVE-2025-64508

Published: Nov 10, 2025Modified: Jun 17, 2026Deferred

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

References (8)

https://github.com/bugsink/bugsink/commit/3f65544aab3ad5303d97009136640de97b0676a5

Source: security-advisories@github.com

https://github.com/bugsink/bugsink/pull/266

Source: security-advisories@github.com

https://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v

Source: security-advisories@github.com

https://github.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627

Source: security-advisories@github.com

https://github.com/google/brotli/issues/1327

Source: security-advisories@github.com

https://github.com/google/brotli/issues/1375

Source: security-advisories@github.com

https://github.com/google/brotli/pull/1234

Source: security-advisories@github.com

https://github.com/google/brotli/releases/tag/v1.2.0

Source: security-advisories@github.com

Timeline

No history available yet.