{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-125757 exists.","exposure":"","fix":"No fix has been published for CVE-2026-125757 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-125757 is a critical vulnerability in mailcow: dockerized, published on 10 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-125757 and fix it if it is affected.\n\nWhat it is: CVE-2026-125757 is a critical vulnerability in mailcow: dockerized, published on 10 Nov 2026. \nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-125757 exists.\n\nAffected product: mailcow: dockerized. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-125757/ (Markdown: https://insights.sbomify.com/CVE-2026-125757/index.md)","id":"CVE-2026-125757","markdown":"https://insights.sbomify.com/CVE-2026-125757/index.md","name":"CVE-2026-125757","record":{"aliases":["GHSA-jgr3-fv33-x43c","GHSA-pg35-3wf2-cwx5"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":9.4,"severity":"critical","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-1336","name":"Improper Neutralization of Special Elements Used in a Template Engine"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-11-10","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-11-10T16:38:30Z","kind":"github_poc","ref":"https://github.com/Faceless0x7/CVE-2026-125757","stars":0,"title":"CVE-2026-125757 Exploit — mailcow domain-wide footer SSTI via rspamd's jinja/lupa engine, enabling cross-tenant RCE in the shared rspamd container."}],"tier":"weaponised"},"has_fix":false,"headline":"mailcow: dockerized before 2026-11 Template Injection RCE via Domain-Wide Footer","id":"CVE-2026-125757","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Aptabase before commit 61d4c01 Authentication Bypass via Known Example AUTH_SECRET","id":"CVE-2026-125758"},"nickname":null,"packages":[],"prev":{"headline":"postal-mime before 4.2.1 Sender Spoofing via Address Parser Domain Truncation","id":"CVE-2026-125756"},"products":["mailcow: dockerized"],"published":"2026-11-10","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-11-10","vendors":["mailcow"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-125757/"}