{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-125757", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-10T12:36:09.843Z", "datePublished": "2026-11-10T15:22:51.515Z", "dateUpdated": "2026-11-10T16:39:42.814Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-10T15:22:51.515Z" }, "datePublic": "2026-11-10T00:00:00.000Z", "title": "mailcow: dockerized before 2026-11 Template Injection RCE via Domain-Wide Footer", "descriptions": [ { "lang": "en", "value": "mailcow: dockerized before 2026-11 contains a server-side template injection vulnerability that allows domain administrators to execute commands in the shared rspamd container by storing a malicious domain-wide footer. Attackers can embed a Jinja macro with an os.execute default value, rendered by the rspamd MOO_FOOTER prefilter, to read or inject mail for every tenant and disable filtering." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Neutralization of Special Elements Used in a Template Engine", "cweId": "CWE-1336", "type": "CWE" } ] } ], "affected": [ { "vendor": "mailcow", "product": "mailcow: dockerized", "defaultStatus": "unaffected", "versions": [ { "version": "0", "status": "affected", "versionType": "custom", "lessThan": "2026-11" } ], "packageURL": "pkg:github/mailcow/mailcow-dockerized", "repo": "https://github.com/mailcow/mailcow-dockerized" } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:mailcow:mailcow\\:_dockerized:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026-11" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 9.4, "baseSeverity": "CRITICAL" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL" } } ], "references": [ { "url": "https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-jgr3-fv33-x43c", "tags": [ "vendor-advisory" ], "name": "GitHub Security Advisory (GHSA-jgr3-fv33-x43c)" }, { "url": "https://github.com/mailcow/mailcow-dockerized/commit/e986803980db8b29435a2ddba5d9760737a818e3", "tags": [ "patch" ] }, { "url": "https://github.com/mailcow/mailcow-dockerized/releases/tag/2026-11", "tags": [ "release-notes" ], "name": "mailcow: dockerized 2026-11 Release Notes" }, { "url": "https://github.com/mailcow/mailcow-dockerized/blob/55982ac74bfd35581cc44b122ab5fc659e3ae90a/data/conf/rspamd/lua/rspamd.local.lua#L847-L850", "tags": [ "technical-description" ] }, { "name": "VulnCheck Advisory: mailcow: dockerized before 2026-11 Template Injection RCE via Domain-Wide Footer", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/mailcow-dockerized-before-2026-11-template-injection-rce-via-domain-wide-footer" } ], "credits": [ { "lang": "en", "value": "Faceless0x7", "type": "finder" } ], "x_generator": { "engine": "vulncheck-endgame" } }, "adp": [ { "references": [ { "url": "https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-jgr3-fv33-x43c", "tags": [ "exploit" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-11-10T16:39:23.238632Z", "id": "CVE-2026-125757", "options": [ { "Exploitation": "poc" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-10T16:39:42.814Z" } } ] } }