{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/39596?format=json","vulnerability_id":"VCID-sx5b-m8yz-63bz","summary":"Improper Input Validation\nMatrix Synapse is prone to a denial of service flaw where malicious events injected with depth = 2^63-1 render rooms unusable, related to `federation/federation_base.py` and `handlers/message.py`.","aliases":[{"alias":"CVE-2018-10657"},{"alias":"GHSA-vmcc-4p4x-x7wg"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/115835?format=json","purl":"pkg:deb/debian/matrix-synapse@0.28.1%2Bdfsg-1?distro=sid","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/matrix-synapse@0.28.1%252Bdfsg-1%3Fdistro=sid"},{"url":"http://public2.vulnerablecode.io/api/packages/115834?format=json","purl":"pkg:deb/debian/matrix-synapse@1.152.1-1?distro=sid","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/matrix-synapse@1.152.1-1%3Fdistro=sid"},{"url":"http://public2.vulnerablecode.io/api/packages/13092?format=json","purl":"pkg:pypi/matrix-synapse@0.33.5","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1k7r-p98w-7bg6"},{"vulnerability":"VCID-2q41-366b-jfbs"},{"vulnerability":"VCID-2uq2-kcfr-87gr"},{"vulnerability":"VCID-3sbj-6gut-cybe"},{"vulnerability":"VCID-44n9-z1mc-fydq"},{"vulnerability":"VCID-4vve-jkk2-rueg"},{"vulnerability":"VCID-57xv-u1be-mfez"},{"vulnerability":"VCID-6bx9-6prt-vffg"},{"vulnerability":"VCID-9jy7-pnmw-1bbq"},{"vulnerability":"VCID-9t8r-dp58-xydr"},{"vulnerability":"VCID-b461-xbt2-9fg1"},{"vulnerability":"VCID-bmw9-6jkv-t3ds"},{"vulnerability":"VCID-bnz6-nw3z-77gd"},{"vulnerability":"VCID-buj8-8fqz-yyfe"},{"vulnerability":"VCID-d6yz-j1f9-cfec"},{"vulnerability":"VCID-djck-vkte-q7he"},{"vulnerability":"VCID-ewxj-3jt9-p7af"},{"vulnerability":"VCID-ftmr-xpa4-mbfd"},{"vulnerability":"VCID-gmab-mbjg-gbet"},{"vulnerability":"VCID-gre7-9vu7-vqdh"},{"vulnerability":"VCID-j8zw-nzgv-mkeq"},{"vulnerability":"VCID-mgxc-w86p-yqcm"},{"vulnerability":"VCID-mqta-hmxv-duh6"},{"vulnerability":"VCID-p7my-33nz-puhn"},{"vulnerability":"VCID-qgzv-dqh8-c3gp"},{"vulnerability":"VCID-rab2-vwyz-ufdt"},{"vulnerability":"VCID-swgx-he8k-1qhy"},{"vulnerability":"VCID-ubx5-xans-8bey"},{"vulnerability":"VCID-z4xn-smp8-tfcj"},{"vulnerability":"VCID-zc47-w46p-9bhx"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@0.33.5"}],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2018-10657","reference_id":"","reference_type":"","scores":[{"value":"0.00459","scoring_system":"epss","scoring_elements":"0.644","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00459","scoring_system":"epss","scoring_elements":"0.64356","published_at":"2026-06-04T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2018-10657"},{"reference_url":"https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI/edit#heading=h.fj95ykuss7s1","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI/edit#heading=h.fj95ykuss7s1"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87eb","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87eb"},{"reference_url":"https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1"},{"reference_url":"https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/","reference_id":"","reference_type":"","scores":[],"url":"https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2018-10657","reference_id":"CVE-2018-10657","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-10657"},{"reference_url":"https://usn.ubuntu.com/6076-1/","reference_id":"USN-6076-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/6076-1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