{"id":"CLSA-2026-1787916225","summary":"nginx: Fix of CVE-2026-56434","details":"- CVE-2026-56434: fix use-after-free in ngx_http_ssi_filter_module from\n  duplicate subrequest finalization; ngx_http_post_request() now skips\n  posting a request that is already queued, and ngx_http_finalize_request()\n  resets r-\u003ewrite_event_handler to a no-op handler during active subrequest\n  finalization","modified":"2026-10-26T09:30:37.239766572Z","published":"2026-08-28T11:23:56Z","upstream":["CVE-2026-56434"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1787916225.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56434"}],"affected":[{"package":{"name":"nginx","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-all-modules","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-all-modules?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-core","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-core?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-filesystem","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-filesystem?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-mod-devel","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-mod-devel?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-mod-http-image-filter","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-mod-http-image-filter?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-mod-http-perl","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-mod-http-perl?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-mod-http-xslt-filter","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-mod-http-xslt-filter?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-mod-mail","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-mod-mail?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}},{"package":{"name":"nginx-mod-stream","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/nginx-mod-stream?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.20.1-14.el9_2.1.alma.1.tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1787916225.json"}}],"schema_version":"1.9.0"}