{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/293144?format=json","vulnerability_id":"VCID-p463-b1yc-jkev","summary":"H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request  number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.","aliases":[{"alias":"CVE-2023-30847"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/924727?format=json","purl":"pkg:deb/debian/h2o@0?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye"},{"url":"http://public2.vulnerablecode.io/api/packages/924728?format=json","purl":"pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye"},{"url":"http://public2.vulnerablecode.io/api/packages/924726?format=json","purl":"pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye"}],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-30847","reference_id":"","reference_type":"","scores":[{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57346","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57368","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57344","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57396","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57398","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57413","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57393","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57372","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57394","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57328","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00348","scoring_system":"epss","scoring_elements":"0.57351","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00497","scoring_system":"epss","scoring_elements":"0.65887","published_at":"2026-04-29T12:55:00Z"},{"value":"0.0056","scoring_system":"epss","scoring_elements":"0.68335","published_at":"2026-05-05T12:55:00Z"},{"value":"0.0056","scoring_system":"epss","scoring_elements":"0.68406","published_at":"2026-05-12T12:55:00Z"},{"value":"0.0056","scoring_system":"epss","scoring_elements":"0.68379","published_at":"2026-05-07T12:55:00Z"},{"value":"0.0056","scoring_system":"epss","scoring_elements":"0.68414","published_at":"2026-05-09T12:55:00Z"},{"value":"0.0056","scoring_system":"epss","scoring_elements":"0.68378","published_at":"2026-05-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-30847"},{"reference_url":"https://github.com/h2o/h2o/pull/3229","reference_id":"3229","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-30T19:51:39Z/"}],"url":"https://github.com/h2o/h2o/pull/3229"},{"reference_url":"https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33","reference_id":"f010336bab162839df43d9e87570897466c97e33","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-30T19:51:39Z/"}],"url":"https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33"},{"reference_url":"https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx","reference_id":"GHSA-p5hj-phwj-hrvx","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-30T19:51:39Z/"}],"url":"https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx"}],"weaknesses":[{"cwe_id":824,"name":"Access of Uninitialized Pointer","description":"The product accesses or uses a pointer that has not been initialized."}],"exploits":[],"severity_range_score":"8.2 - 8.2","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-p463-b1yc-jkev"}