{"action":"Upgrade matrix-sydent to 2.3.0 or later.","affected":[{"fixed":"2.3.0","introduced":"0"}],"component":"matrix-sydent","cve_ids":["CVE-2021-29430"],"ecosystem":"PyPI","epss":0.01833,"exploited":false,"fixed_versions":["2.3.0"],"ghsa_id":"GHSA-wmg4-8cp2-hpg9","id":"tcs_01M5KG2FE2B3QBMNKV5EWTN9HS","modified_at":"2026-09-10T03:49:26.904044812Z","published_at":"2021-04-19T14:54:04Z","references":["https://osv.dev/vulnerability/GHSA-wmg4-8cp2-hpg9","https://github.com/matrix-org/sydent/security/advisories/GHSA-wmg4-8cp2-hpg9","https://nvd.nist.gov/vuln/detail/CVE-2021-29430","https://github.com/matrix-org/sydent/commit/0523511d2fb40f2738f8a8549868f44b96e5dab7","https://github.com/matrix-org/sydent/commit/89071a1a754c69a50deac89e6bb74002d4cda19d","https://github.com/matrix-org/sydent/commit/f56eee315b6c44fdd9f6aa785cc2ec744a594428","https://github.com/matrix-org/sydent","https://github.com/matrix-org/sydent/releases/tag/v2.3.0","https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-21.yaml","https://pypi.org/project/matrix-sydent"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-wmg4-8cp2-hpg9","url":"https://osv.dev/vulnerability/GHSA-wmg4-8cp2-hpg9"}],"summary":"Sydent vulnerable to denial of service attack via memory exhaustion"}