{"cve":"CVE-2025-64508","nvd":{"published":"2025-11-10T22:15:39.640","modified":"2026-06-17T09:54:29.160","status":"Deferred","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/bugsink/bugsink/commit/3f65544aab3ad5303d97009136640de97b0676a5","https://github.com/bugsink/bugsink/pull/266","https://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v","https://github.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627","https://github.com/google/brotli/issues/1327"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:14:53.307938015+00:00"},"epss":{"cve":"CVE-2025-64508","score":0.00506,"percentile":0.43208,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fc2v-vcwj-269v","url":"https://osv.dev/vulnerability/GHSA-fc2v-vcwj-269v","summary":"Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input","modified":"2026-07-07T17:57:28.581611571Z","packages":[{"ecosystem":"PyPI","name":"bugsink","purl":"pkg:pypi/bugsink","ranges":["<2.0.5"],"fixed":["2.0.5"]}]},{"id":"PYSEC-2026-1225","url":"https://osv.dev/vulnerability/PYSEC-2026-1225","summary":"Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input","modified":"2026-07-07T17:47:33.582873164Z","packages":[{"ecosystem":"PyPI","name":"bugsink","purl":"pkg:pypi/bugsink","ranges":["<2.0.5"],"fixed":["2.0.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}