{"id":"GHSA-w8gf-g2vq-j2f4","aliases":[],"status":"published","title":"amphp/http-client  Denial of Service via HTTP/2 CONTINUATION Frames","description":"Early versions of `amphp/http-client` with HTTP/2 support (v4.0.0-rc10 to 4.0.0) will collect HTTP/2 `CONTINUATION` frames in an unbounded buffer and will not check the header size limit until it has received the `END_HEADERS` flag, resulting in an OOM crash. Later versions of `amphp/http-client` (v4.1.0-rc1 and up) depend on `amphp/http` for HTTP/2 processing and will therefore need an updated version of `amphp/http`, see [GHSA-qjfw-cvjf-f4fm](https://github.com/amphp/http/security/advisories/GHSA-qjfw-cvjf-f4fm).\n\n## Acknowledgements\n\nThank you to [Bartek Nowotarski](https://nowotarski.info/) for reporting the vulnerability.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770","CWE-789"],"published":"2024-04-03T18:49:42Z","modified":"2026-07-08T06:52:51Z","fixes":[{"ecosystem":"Packagist","package":"amphp/http-client","fixed_in":["4.1.0-rc1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"amphp/http-client","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-rc10"},{"last_affected":"4.0.0"},{"fixed":"4.1.0-rc1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"amphp/http-client","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-rc10"},{"fixed":"4.1.0-rc1"}]}],"versions":["v4.0.0","v4.0.0-rc10","v4.0.0-rc11"]}],"references":[{"url":"https://github.com/amphp/http-client/security/advisories/GHSA-w8gf-g2vq-j2f4","tags":["web"]},{"url":"https://github.com/amphp/http/security/advisories/GHSA-qjfw-cvjf-f4fm","tags":["web"]},{"url":"https://github.com/advisories/GHSA-w8gf-g2vq-j2f4"},{"url":"https://github.com/amphp/http-client","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-w8gf-g2vq-j2f4","title":"amphp/http-client  Denial of Service via HTTP/2 CONTINUATION Frames","description":"Early versions of `amphp/http-client` with HTTP/2 support (v4.0.0-rc10 to 4.0.0) will collect HTTP/2 `CONTINUATION` frames in an unbounded buffer and will not check the header size limit until it has received the `END_HEADERS` flag, resulting in an OOM crash. Later versions of `amphp/http-client` (v4.1.0-rc1 and up) depend on `amphp/http` for HTTP/2 processing and will therefore need an updated version of `amphp/http`, see [GHSA-qjfw-cvjf-f4fm](https://github.com/amphp/http/security/advisories/GHSA-qjfw-cvjf-f4fm).\n\n## Acknowledgements\n\nThank you to [Bartek Nowotarski](https://nowotarski.info/) for reporting the vulnerability.","status":"published","published":"2024-04-03T18:49:42Z","modified":"2024-04-03T18:49:43Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-770","CWE-789"],"updated_at":"2026-11-02T14:37:42.744468Z"}],"osv":[{"id":"GHSA-w8gf-g2vq-j2f4","title":"amphp/http-client  Denial of Service via HTTP/2 CONTINUATION Frames","description":"Early versions of `amphp/http-client` with HTTP/2 support (v4.0.0-rc10 to 4.0.0) will collect HTTP/2 `CONTINUATION` frames in an unbounded buffer and will not check the header size limit until it has received the `END_HEADERS` flag, resulting in an OOM crash. Later versions of `amphp/http-client` (v4.1.0-rc1 and up) depend on `amphp/http` for HTTP/2 processing and will therefore need an updated version of `amphp/http`, see [GHSA-qjfw-cvjf-f4fm](https://github.com/amphp/http/security/advisories/GHSA-qjfw-cvjf-f4fm).\n\n## Acknowledgements\n\nThank you to [Bartek Nowotarski](https://nowotarski.info/) for reporting the vulnerability.","status":"published","published":"2024-04-03T18:49:42Z","modified":"2026-07-08T06:52:51.943094832Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-770","CWE-789"],"updated_at":"2026-11-02T15:46:58.401149Z"}]}}