{"id":"GHSA-wxmh-65f7-jcvw","summary":"Improper header name validation in guzzlehttp/psr7","details":"### 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 1.9.1 and 2.4.5.\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\n","aliases":["CVE-2023-29197"],"modified":"2026-01-30T02:34:45.713420Z","published":"2023-04-19T18:25:53Z","related":["CVE-2023-29197","CVE-2023-29530","CVE-2025-24013"],"database_specific":{"github_reviewed_at":"2023-04-19T18:25:53Z","nvd_published_at":"2023-04-17T22:15:09Z","cwe_ids":["CWE-436"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/guzzle/psr7/security/advisories/GHSA-q7rv-6hp3-vh96"},{"type":"WEB","url":"https://github.com/guzzle/psr7/security/advisories/GHSA-wxmh-65f7-jcvw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29197"},{"type":"WEB","url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=2022-24775"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/psr7/CVE-2023-29197.yaml"},{"type":"PACKAGE","url":"https://github.com/guzzle/psr7"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/12/msg00028.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FJANWDXJZE5BGLN4MQ4FEHV5LJ6CMKQF"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O35UN4IK6VS2LXSRWUDFWY7NI73RKY2U"},{"type":"WEB","url":"https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4"}],"affected":[{"package":{"name":"guzzlehttp/psr7","ecosystem":"Packagist","purl":"pkg:composer/guzzlehttp/psr7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1"}]}],"versions":["1.0.0","1.1.0","1.2.0","1.2.1","1.2.2","1.2.3","1.3.0","1.3.1","1.4.0","1.4.1","1.4.2","1.5.0","1.5.1","1.5.2","1.6.0","1.6.1","1.7.0","1.8.0","1.8.1","1.8.2","1.8.3","1.8.4","1.8.5","1.9.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/04/GHSA-wxmh-65f7-jcvw/GHSA-wxmh-65f7-jcvw.json"}},{"package":{"name":"guzzlehttp/psr7","ecosystem":"Packagist","purl":"pkg:composer/guzzlehttp/psr7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.4.5"}]}],"versions":["2.0.0","2.1.0","2.1.1","2.1.2","2.2.0","2.2.1","2.2.2","2.3.0","2.4.0","2.4.1","2.4.2","2.4.3","2.4.4"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/04/GHSA-wxmh-65f7-jcvw/GHSA-wxmh-65f7-jcvw.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}