CVE-2026-107851

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Source
https://cve.org/CVERecord?id=CVE-2026-107851
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107851.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-107851
Aliases
Published
2026-10-09T20:26:31Z
Modified
2026-10-28T02:30:47Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Contao: Improper access control in the table access voter
Details

Contao is an Open Source CMS. From version 5.7.0 until 5.7.12, TableAccessVoter::hasAccessToModule() in core-bundle/src/Security/Voter/DataContainer/TableAccessVoter.php caches authorization decisions using only $tokenHash, a hash of the user's security token, and omits the table returned by getDataSource(). If one request first checks a table allowed to the user and then a different denied table, the voter can reuse the allowed result, while DefaultDataContainerVoter can convert an incorrect abstention into a grant. A low-privileged backend user can consequently read, create, update, or delete records in tables outside assigned module permissions, including tables containing member or newsletter-subscriber data. This issue is fixed in version 5.7.12.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-524",
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107851.json"
}
References

Affected packages

Git / github.com/contao/contao

Affected ranges

Type
GIT
Repo
https://github.com/contao/contao
Events
Introduced
72bb9e0235574397cf06a2165dc21fdd19186c74
Fixed
a6543f49a92187a7368f51b290179c4795386e23
Fixed
9d6f582a4cc6a758ce11d1043fc9c0ba62c5f4c9
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "5.7.0"
                },
                {
                    "fixed":  "5.7.12"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "9d6f582a4cc6a758ce11d1043fc9c0ba62c5f4c9"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "5.7.12",
            "range":  [
                {
                    "fixed":  "a6543f49a92187a7368f51b290179c4795386e23"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

5.*
5.7.0
5.7.1
5.7.10
5.7.11
5.7.2
5.7.3
5.7.4
5.7.5
5.7.6
5.7.7
5.7.8
5.7.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107851.json"