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VulnerabilityPublished Updated

CVE-2025-64509: bugsink · Unthrottled Resource Allocation

Affects bugsinkSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited · CVSS 7.5 High : upgrade to 2.0.6 soon.

Data as of 12 Nov 2026, 20:15 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.17.5
Patch
Available – fixed in 2.0.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Upgrade bugsink to 2.0.6.

Affected software

ProductAffectedFixed in
bugsink bugsinkAffected
  • <2.0.6
Fixed in
  • 2.0.6

AI-suggested

Upgrade Bugsink to version 2.0.6 or later, where this vulnerability is patched. No additional mitigation is required once the official fix is applied.

Description

CVE-2025-64509 is a high-severity vulnerability in Bugsink, a self-hosted error tracking tool. Versions prior to 2.0.6 are affected by an issue where processing a specially crafted Brotli-compressed envelope can cause excessive CPU consumption during decompression, resulting in denial of service. The attack requires knowledge of the DSN, which is often exposed in common setups such as JavaScript and mobile applications. This vulnerability is distinct but related to another Brotli decompression issue in Bugsink (CVE-2025-64508). The issue is fixed in version 2.0.6.

References

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