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The problem has been patched in following versions 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.1, and 2.25.1. As a workaround, validate HTTP header keys and/or values, and if using user-supplied values, filter them to strip off leading or trailing newline characters before calling `withHeader()`.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-29530","reference_id":"","reference_type":"","scores":[{"value":"0.00671","scoring_system":"epss","scoring_elements":"0.71855","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-29530"},{"reference_url":"https://github.com/laminas/laminas-diactoros","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/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/laminas/laminas-diactoros"},{"reference_url":"https://github.com/laminas/laminas-diactoros/commit/7e721a60a09c5119c98694c2d23fc031094e1f1c","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/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/laminas/laminas-diactoros/commit/7e721a60a09c5119c98694c2d23fc031094e1f1c"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPW54QK7ISDALPLP2CKODU4ZIVRYS336","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPW54QK7ISDALPLP2CKODU4ZIVRYS336"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29530","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/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-2023-29530"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPW54QK7ISDALPLP2CKODU4ZIVRYS336/","reference_id":"BPW54QK7ISDALPLP2CKODU4ZIVRYS336","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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/2025-02-12T17:05:24Z/"}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPW54QK7ISDALPLP2CKODU4ZIVRYS336/"},{"reference_url":"https://github.com/advisories/GHSA-wxmh-65f7-jcvw","reference_id":"GHSA-wxmh-65f7-jcvw","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-12T17:05:24Z/"}],"url":"https://github.com/advisories/GHSA-wxmh-65f7-jcvw"},{"reference_url":"https://github.com/advisories/GHSA-xv3h-4844-9h36","reference_id":"GHSA-xv3h-4844-9h36","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-xv3h-4844-9h36"},{"reference_url":"https://github.com/laminas/laminas-diactoros/security/advisories/GHSA-xv3h-4844-9h36","reference_id":"GHSA-xv3h-4844-9h36","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-12T17:05:24Z/"}],"url":"https://github.com/laminas/laminas-diactoros/security/advisories/GHSA-xv3h-4844-9h36"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/379401?format=json","purl":"pkg:composer/laminas/laminas-diactoros@2.18.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:composer/laminas/laminas-diactoros@2.18.1"},{"url":"http://public2.vulnerablecode.io/api/packages/379403?format=json","purl":"pkg:composer/laminas/laminas-diactoros@2.19.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:composer/laminas/laminas-diactoros@2.19.1"},{"url":"http://public2.vulnerablecode.io/api/packages/379405?format=json","purl":"pkg:composer/laminas/laminas-diactoros@2.20.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:composer/laminas/laminas-diactoros@2.20.1"},{"url":"http://public2.vulnerablecode.io/api/packages/379407?format=json","purl":"pkg:composer/laminas/laminas-diactoros@2.21.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:co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