CVE-2025-64508

HIGH EPSS 32.7%
Published Nov 10, 20257mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 10, 2025 7mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
32.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-770

References 8

  • github.com https://github.com/bugsink/bugsink/commit/3f65544aab3ad5303d97009136640de97b0676a5
  • github.com https://github.com/bugsink/bugsink/pull/266
  • github.com https://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v
  • github.com https://github.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627
  • github.com https://github.com/google/brotli/issues/1327
  • github.com https://github.com/google/brotli/issues/1375
  • github.com https://github.com/google/brotli/pull/1234
  • github.com https://github.com/google/brotli/releases/tag/v1.2.0

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.