{"schemaVersion":3,"id":"CVE-2026-42946","aliases":["ALPINE-CVE-2026-42946","UBUNTU-CVE-2026-42946","DEBIAN-CVE-2026-42946","CGA-64w4-5q7m-h44m","CGA-66w2-6h4c-wh68","CGA-9278-rqj5-ppjx","CGA-v5mh-jp5j-x3gc"],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","dates":{"published":"2026-05-13T14:12:44.697Z","modified":"2026-05-13T16:06:56.898Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.3,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.3,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":8.3,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Wolfi","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.3,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00932,"percentile":0.60057,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00932},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00932,"percentile":0.60057}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00491,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00932,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00932,"percentile":0.60057}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value","description":"The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/789.html"},{"id":"CWE-823","name":"Use of Out-of-range Pointer Offset","description":"The product performs pointer arithmetic on a valid pointer, but it uses an offset that can point outside of the intended range of valid memory locations for the resulting pointer.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/823.html"}],"affected":[{"vendor":"alpine","product":"nginx","name":"nginx","label":"nginx","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/nginx","purlType":"apk","versions":[{"text":"< 1.26.3-r1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.3-r1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.30.1-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.26.3-r1 | < 1.28.3-r1 | < 1.30.1-r0","eol":null,"hubHref":null},{"vendor":"chainguard","product":"nginx-mainline","name":"nginx-mainline","label":"nginx-mainline","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/nginx-mainline","purlType":"apk","versions":[{"text":"< 1.31.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.31.0-r0","eol":null,"hubHref":null},{"vendor":"chainguard","product":"nginx-stable","name":"nginx-stable","label":"nginx-stable","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/nginx-stable","purlType":"apk","versions":[{"text":"< 1.30.1-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.30.1-r0","eol":null,"hubHref":null},{"vendor":"wolfi","product":"nginx-mainline","name":"nginx-mainline","label":"nginx-mainline","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/nginx-mainline","purlType":"apk","versions":[{"text":"< 1.31.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.31.0-r0","eol":null,"hubHref":null},{"vendor":"wolfi","product":"nginx-stable","name":"nginx-stable","label":"nginx-stable","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/nginx-stable","purlType":"apk","versions":[{"text":"< 1.30.1-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.30.1-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"nginx","name":"nginx","label":"nginx","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/nginx","purlType":"deb","versions":[{"text":"< 1.22.1-9+deb12u8","noFixRecorded":false,"fixedIn":null},{"text":"< 1.26.3-3+deb13u6","noFixRecorded":false,"fixedIn":null},{"text":"< 1.30.0-4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.22.1-9+deb12u8 | < 1.26.3-3+deb13u6 | < 1.30.0-4","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"nginx","name":"nginx","label":"nginx","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/nginx","purlType":"deb","versions":[{"text":"< 1.4.6-1ubuntu3.9+esm6","noFixRecorded":false,"fixedIn":null},{"text":"< 1.10.3-0ubuntu0.16.04.5+esm7","noFixRecorded":false,"fixedIn":null},{"text":"< 1.14.0-0ubuntu1.11+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.18.0-0ubuntu1.7+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.18.0-6ubuntu14.12","noFixRecorded":false,"fixedIn":null},{"text":"< 1.24.0-2ubuntu7.9","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.0-6ubuntu1.4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.3-2ubuntu1.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.4.6-1ubuntu3.9+esm6 | < 1.10.3-0ubuntu0.16.04.5+esm7 | < 1.14.0-0ubuntu1.11+esm2 | < 1.18.0-0ubuntu1.7+esm1 | < 1.18.0-6ubuntu14.12 | < 1.24.0-2ubuntu7.9 | < 1.28.0-6ubuntu1.4 | < 1.28.3-2ubuntu1.2","eol":null,"hubHref":null},{"vendor":"f5","product":"dos","name":"dos","label":"dos","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.3.0, ≤ 4.7.0","noFixRecorded":false,"fixedIn":null},{"text":"4.8.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.3.0, ≤ 4.7.0 | 4.8.0","eol":null,"hubHref":"/vendor/f5/dos"},{"vendor":"f5","product":"nginx gateway fabric","name":"NGINX Gateway Fabric","label":"nginx gateway fabric","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.3.0, ≤ 1.6.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.0.0, ≤ 2.6.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.3.0, ≤ 1.6.2 | ≥ 2.0.0, ≤ 2.6.0","eol":null,"hubHref":"/vendor/f5/nginx_gateway_fabric"},{"vendor":"f5","product":"nginx ingress controller","name":"NGINX Ingress Controller","label":"nginx ingress controller","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 3.5.0, ≤ 3.7.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.0.0, ≤ 4.0.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.0.0, ≤ 5.4.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.5.0, ≤ 3.7.2 | ≥ 4.0.0, ≤ 4.0.1 | ≥ 5.0.0, ≤ 5.4.2","eol":null,"hubHref":"/vendor/f5/nginx_ingress_controller"},{"vendor":"f5","product":"nginx_instance_manager","name":"nginx instance manager","label":"nginx_instance_manager","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.16.0, ≤ 2.22.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.16.0, ≤ 2.22.0","eol":null,"hubHref":"/vendor/f5/nginx_instance_manager"},{"vendor":"f5","product":"nginx open source","name":"NGINX Open Source","label":"nginx open source","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 0.8.42, < 1.30.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0.8.42, ≤ 0.9.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.0.0, ≤ 1.30.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.8.42, < 1.30.1 | ≥ 0.8.42, ≤ 0.9.7 | ≥ 1.0.0, ≤ 1.30.0","eol":null,"hubHref":"/vendor/f5/nginx_open_source"},{"vendor":"f5","product":"nginx plus","name":"NGINX Plus","label":"nginx plus","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ R36, < R36 P4","noFixRecorded":false,"fixedIn":null},{"text":"≥ R32, < R32 P6","noFixRecorded":false,"fixedIn":null},{"text":"≥ r32, ≤ r36","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ R36, < R36 P4 | ≥ R32, < R32 P6 | ≥ r32, ≤ r36","eol":null,"hubHref":"/vendor/f5/nginx_plus"},{"vendor":"f5","product":"waf","name":"waf","label":"waf","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.9.0, ≤ 4.16.0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.1.0, ≤ 5.8.0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.9.0, ≤ 5.12.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.9.0, ≤ 4.16.0 | ≥ 5.1.0, ≤ 5.8.0 | ≥ 5.9.0, ≤ 5.12.1","eol":null,"hubHref":"/vendor/f5/waf"}],"affectedCount":14,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://my.f5.com/manage/s/article/K000161027","label":"my.f5.com/manage/s/article/K000161027","hostname":"my.f5.com","tags":["Vendor Advisory","Patch","REPORT","Advisory","Mitigation"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-42946","label":"security.alpinelinux.org/vuln/CVE-2026-42946","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-42946","label":"ubuntu.com/security/CVE-2026-42946","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-42946","label":"www.cve.org/CVERecord?id=CVE-2026-42946","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://nginx.org/en/security_advisories.html","label":"nginx.org/en/security_advisories.html","hostname":"nginx.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8354-1","label":"ubuntu.com/security/notices/USN-8354-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-8375-1","label":"ubuntu.com/security/notices/USN-8375-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-42946","label":"security-tracker.debian.org/tracker/CVE-2026-42946","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42946","label":"nvd.nist.gov/vuln/detail/CVE-2026-42946","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0156","OPENSUSE-SU-2026:10796-1","SUSE-SU-2026:2370-1"],"duplicates":[],"related":["CGA-HF44-RXWR-M2PF","OPENSUSE-SU-2026:10796-1","SUSE-SU-2026:2370-1","USN-8354-1","USN-8375-1"]},"timeline":[{"kind":"published","date":"2026-05-13T14:12:44.697Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-13T16:06:56.898Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T18:35:18.279Z","stale":false,"partial":false}}