{"id":"GHSA-wjfc-pgfp-pv9c","aliases":[],"status":"published","title":"Improper Input Validation in nyholm/psr7","description":"### Impact\n\nImproper header parsing. An attacker could sneak in a newline (`\\n`) into both the header names and values. While the specification states that `\\r\\n\\r\\n` is used to terminate the header list, many servers in the wild will also accept `\\n\\n`.\n\n### Patches\n\nThe issue is patched in 1.6.1.\n\n### Workarounds\n\nThere are no known workarounds.\n\n### References\n\n* https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-436"],"published":"2023-04-21T20:27:30Z","modified":"2024-11-29T05:28:02Z","fixes":[{"ecosystem":"Packagist","package":"nyholm/psr7","fixed_in":["1.6.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"nyholm/psr7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"nyholm/psr7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.1"}]}],"versions":["0.1.0","0.2.0","0.2.1","0.2.2","0.2.3","0.3.0","1.0.0","1.0.1","1.1.0","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","1.4.0","1.4.1","1.5.0","1.5.1","1.6.0"]}],"references":[{"url":"https://github.com/Nyholm/psr7/security/advisories/GHSA-wjfc-pgfp-pv9c","tags":["web"]},{"url":"https://github.com/guzzle/psr7/security/advisories/GHSA-q7rv-6hp3-vh96","tags":["web"]},{"url":"https://github.com/guzzle/psr7/security/advisories/GHSA-wxmh-65f7-jcvw","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29197","tags":["advisory"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/nyholm/psr7/2023-04-17.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-wjfc-pgfp-pv9c"},{"url":"https://github.com/Nyholm/psr7","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-wjfc-pgfp-pv9c","title":"Improper Input Validation in nyholm/psr7","description":"### Impact\n\nImproper header parsing. An attacker could sneak in a newline (`\\n`) into both the header names and values. While the specification states that `\\r\\n\\r\\n` is used to terminate the header list, many servers in the wild will also accept `\\n\\n`.\n\n### Patches\n\nThe issue is patched in 1.6.1.\n\n### Workarounds\n\nThere are no known workarounds.\n\n### References\n\n* https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4","status":"published","published":"2023-04-21T20:27:30Z","modified":"2023-04-24T16:58:47Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-436"],"updated_at":"2026-11-02T14:36:51.39133Z"}],"osv":[{"id":"GHSA-wjfc-pgfp-pv9c","title":"Improper Input Validation in nyholm/psr7","description":"### Impact\n\nImproper header parsing. An attacker could sneak in a newline (`\\n`) into both the header names and values. While the specification states that `\\r\\n\\r\\n` is used to terminate the header list, many servers in the wild will also accept `\\n\\n`.\n\n### Patches\n\nThe issue is patched in 1.6.1.\n\n### Workarounds\n\nThere are no known workarounds.\n\n### References\n\n* https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4","status":"published","published":"2023-04-21T20:27:30Z","modified":"2024-11-29T05:28:02.962505Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-436"],"updated_at":"2026-11-02T15:46:58.767335Z"}]}}