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CVE-2026-40878

mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the mailcow web interface passes the raw `$_SERVER['REQUEST_URI']` to Twig as a global template variable and renders it inside a JavaScript string literal in the `setLang()` helper of `base.twig`, relying on Twig's default HTML auto-escaping instead of the context-appropriate `js` escaping strategy. In addition, the `query_string()` Twig helper merges all current `$_GET` parameters into th
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e06cef7460eb0f5e74ef43416be3a518fe67e53aa2731095bd1175415d6c3ecd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"mailcow-dockerized","vendor":"mailcow","versions":[{"status":"affected","version":"< 2026-03b"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:90fb21cfca2e614762f4b3ddb69feffda712613fb56229185847838cc4fd7d13 · sha256:8102f35d602ff8d2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.1,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:90fb21cfca2e614762f4b3ddb69feffda712613fb56229185847838cc4fd7d13 · sha256:8102f35d602ff8d2… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:90fb21cfca2e614762f4b3ddb69feffda712613fb56229185847838cc4fd7d13 · sha256:8102f35d602ff8d2… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-xv9r-j862-5hqf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-xv9r-j862-5hqf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:90fb21cfca2e614762f4b3ddb69feffda712613fb56229185847838cc4fd7d13 · sha256:8102f35d602ff8d2… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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