CVE-2026-104890
- Source
- https://cve.org/CVERecord?id=CVE-2026-104890
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104890.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-104890
- Aliases
- Published
- 2026-10-05T15:46:21Z
- Modified
- 2026-10-21T02:54:32Z
- Severity
-
- 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution
- Details
-
Kunstmaan CMS is an open source content management system based on the Symfony framework. Prior to 7.3.2, src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php performs the blacklisted_extensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An authenticated backend user with media access can upload a mixed-case executable extension such as PHP that bypasses the check and is stored in the web-accessible media directory with an executable lowercase extension. The default blacklist also omits several server-executable extension types, allowing the same code-execution impact where the web server executes uploaded files. This issue is fixed in version 7.3.2.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-434" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104890.json" }- References
-
- https://github.com/Kunstmaan/KunstmaanBundlesCMS/releases/tag/7.3.2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104890.json
- https://github.com/Kunstmaan/KunstmaanBundlesCMS/security/advisories/GHSA-p279-5wcv-45vq
- https://nvd.nist.gov/vuln/detail/CVE-2026-104890
- https://github.com/Kunstmaan/KunstmaanBundlesCMS/commit/1bbdfdeac8e7e91506b1a9271360b9b68d7690d3
Affected packages
Git / github.com/kunstmaan/kunstmaanbundlescms
Affected ranges
- Type
- GIT
- Repo
- https://github.com/kunstmaan/kunstmaanbundlescms
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "7.3.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "1bbdfdeac8e7e91506b1a9271360b9b68d7690d3" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "7.3.2", "range": [ { "fixed": "0f8fb55a7408a92afd34504682a9adc253d34401" } ], "source": "REFERENCES_TAG" } ] }