{"action":"Upgrade matrix-synapse to 0.31.2 or later.","affected":[{"fixed":"0.31.2","introduced":"0"}],"component":"matrix-synapse","cve_ids":["CVE-2018-12423"],"ecosystem":"PyPI","epss":0.01811,"exploited":false,"fixed_versions":["0.31.2"],"ghsa_id":"GHSA-ch5v-fhg8-7gv9","id":"tcs_01M5KHDXC28QS7SCHHV13Z4GJB","modified_at":"2026-07-07T11:46:05.879609167Z","published_at":"2026-07-06T08:03:21.080320Z","references":["https://osv.dev/vulnerability/PYSEC-2026-844","https://nvd.nist.gov/vuln/detail/CVE-2018-12423","https://github.com/matrix-org/matrix-doc/issues/1304","https://bugs.debian.org/901549","https://github.com/matrix-org/synapse","https://matrix.org/blog/2018/06/14/security-update-synapse-0-31-2","https://pypi.org/project/matrix-synapse","https://github.com/advisories/GHSA-ch5v-fhg8-7gv9"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-844","url":"https://osv.dev/vulnerability/PYSEC-2026-844"}],"summary":"Matrix Synapse Authorization Error"}