GHSA-RRX3-2X4G-MQ2H
Vulnerability from github – Published: 2025-11-13 00:11 – Updated: 2025-11-13 00:11
VLAI
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
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "bugsink"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-64509"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2025-11-13T00:11:26Z",
"nvd_published_at": "2025-11-10T22:15:39Z",
"severity": "HIGH"
},
"details": "### Impact\n\nIn affected versions, a specially crafted Brotli-compressed envelope can cause Bugsink to spend excessive CPU time in decompression, leading to denial of service.\n\nThis can be done if the DSN is known, which it is in many common setups (JavaScript, Mobile Apps).\n\n### Patches\n\nPatched in Bugsink 2.0.6\n\n### References\n\nThe vulnerability in this security advisory is similar to, but distinct from, another brotli-related problem in Bugsink:\n\nhttps://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v",
"id": "GHSA-rrx3-2x4g-mq2h",
"modified": "2025-11-13T00:11:27Z",
"published": "2025-11-13T00:11:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/bugsink/bugsink/security/advisories/GHSA-rrx3-2x4g-mq2h"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64509"
},
{
"type": "WEB",
"url": "https://github.com/bugsink/bugsink/commit/1201f754e39265d2aac58edf49dc380bac334388"
},
{
"type": "PACKAGE",
"url": "https://github.com/bugsink/bugsink"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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