PYSEC-2026-1227
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/bugsink/PYSEC-2026-1227.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-1227
- Aliases
- Published
- 2026-07-07T16:03:10.164693Z
- Modified
- 2026-07-07T17:47:33.578412163Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)
- Details
-
Impact
In affected versions, a specially crafted Brotli-compressed envelope can cause Bugsink to spend excessive CPU time in decompression, leading to denial of service.
This can be done if the DSN is known, which it is in many common setups (JavaScript, Mobile Apps).
Patches
Patched in Bugsink 2.0.6
References
The vulnerability in this security advisory is similar to, but distinct from, another brotli-related problem in Bugsink:
https://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v
- References
-
- https://github.com/bugsink/bugsink/security/advisories/GHSA-rrx3-2x4g-mq2h
- https://nvd.nist.gov/vuln/detail/CVE-2025-64509
- https://github.com/bugsink/bugsink/commit/1201f754e39265d2aac58edf49dc380bac334388
- https://github.com/bugsink/bugsink
- https://pypi.org/project/bugsink
- https://github.com/advisories/GHSA-rrx3-2x4g-mq2h
Affected packages
PyPI / bugsink
Package
- Name
- bugsink
- View open source insights on deps.dev
- Purl
- pkg:pypi/bugsink
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.0.6
Affected versions
0.*
0.0.1
0.1.12
0.1.13
0.1.14
0.1.15
0.1.16
0.1.17
0.1.18
0.1.19
0.1.20
1.*
1.0.0
1.0.1
1.1.0
1.1.1
1.1.2
1.2.0
1.3.0
1.4.0
1.4.1
1.4.2
1.4.3
1.5.0
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.6.0
1.6.1
1.6.2
1.6.3
1.6.4
1.7.0
1.7.1
1.7.2
1.7.3
1.7.4
1.7.5
1.7.6
2.*
2.0.0a1
2.0.0
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5