{"cve":"CVE-2023-27522","nvd":{"published":"2023-03-07T16:15:09.613","modified":"2026-06-17T05:45:23.607","status":"Analyzed","description":"HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55.\n\nSpecial characters in the origin response header can truncate/split the response forwarded to the client.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-444"],"references":["https://httpd.apache.org/security/vulnerabilities_24.html","https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html","https://security.gentoo.org/glsa/202309-01","https://httpd.apache.org/security/vulnerabilities_24.html","https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html"],"products":["apache:http_server","debian:debian_linux","unbit:uwsgi"],"source":"nvd","synced_at":"2026-10-19T21:37:41.955480748+00:00"},"epss":{"cve":"CVE-2023-27522","score":0.02134,"percentile":0.81998,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vcph-37mh-fqrh","url":"https://osv.dev/vulnerability/GHSA-vcph-37mh-fqrh","summary":"Apache HTTP Server via mod_proxy_uwsgi HTTP response smuggling","modified":"2026-07-07T11:56:18.462638605Z","packages":[{"ecosystem":"PyPI","name":"uwsgi","purl":"pkg:pypi/uwsgi","ranges":["<2.0.22"],"fixed":["2.0.22"]}]},{"id":"PYSEC-2026-1058","url":"https://osv.dev/vulnerability/PYSEC-2026-1058","summary":"Apache HTTP Server via mod_proxy_uwsgi HTTP response smuggling","modified":"2026-07-07T11:56:18.462638605Z","packages":[{"ecosystem":"PyPI","name":"uwsgi","purl":"pkg:pypi/uwsgi","ranges":["<2.0.22"],"fixed":["2.0.22"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}