CVE Explorer

CVE-2026-9558

A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1e6d1c90f95252e95b58128eb71503c95fd81af71f6070099d8cb37b7ae64ae3

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"collectionURL":"https://packagist.org","defaultStatus":"unaffected","packageName":"mautic/core","repo":"https://github.com/mautic/mautic","versions":[{"lessThan":"4.4.20","status":"affected","version":"1.3.0","versionType":"semver"},{"lessThan":"5.2.11","status":"affected","version":"5.0.0","versionType":"semver"},{"lessThan":"6.0.9","status":"affected","version":"6.0.0","versionType":"semver"},{"lessThan":"7.1.2","status":"affected","version":"7.0.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:7b096c51513ed159174e55c6a6b1733b26a408457559e97ed6db6ae9675a1949 · sha256:4fd7987aa18cc270… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:7b096c51513ed159174e55c6a6b1733b26a408457559e97ed6db6ae9675a1949 · sha256:4fd7987aa18cc270… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-1336","description":"CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:7b096c51513ed159174e55c6a6b1733b26a408457559e97ed6db6ae9675a1949 · sha256:4fd7987aa18cc270… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"url":"https://github.com/mautic/mautic/security/advisories/GHSA-9fx4-7cmj-47vg"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:7b096c51513ed159174e55c6a6b1733b26a408457559e97ed6db6ae9675a1949 · sha256:4fd7987aa18cc270… · /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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