sqlmapproject/sqlmap · error · SqlmapUnsupportedDBMSException

you provided an unsupported back-end DBMS operating system.

Error message

you provided an unsupported back-end DBMS operating system. The supported DBMS operating systems for OS and file system access are %s. If you do not know the back-end DBMS underlying OS, do not provide it and sqlmap will fingerprint it for you.

What it means

Error "you provided an unsupported back-end DBMS operating system. The supported DBMS operating systems for OS and file system access are %s. If you do not know the back-end DBMS underlying OS, do not provide it and sqlmap will fingerprint it for you." thrown in sqlmapproject/sqlmap.

Source

Thrown at lib/core/option.py:773

    conf.fileWriteType = getFileType(conf.fileWrite)

def _setOS():
    """
    Force the back-end DBMS operating system option.
    """

    if not conf.os:
        return

    if conf.os.lower() not in SUPPORTED_OS:
        errMsg = "you provided an unsupported back-end DBMS operating "
        errMsg += "system. The supported DBMS operating systems for OS "
        errMsg += "and file system access are %s. " % ', '.join([o.capitalize() for o in SUPPORTED_OS])
        errMsg += "If you do not know the back-end DBMS underlying OS, "
        errMsg += "do not provide it and sqlmap will fingerprint it for "
        errMsg += "you."
        raise SqlmapUnsupportedDBMSException(errMsg)

    debugMsg = "forcing back-end DBMS operating system to user defined "
    debugMsg += "value '%s'" % conf.os
    logger.debug(debugMsg)

    Backend.setOs(conf.os)

def _setTechnique():
    validTechniques = sorted(getPublicTypeMembers(PAYLOAD.TECHNIQUE), key=lambda x: x[1])
    validLetters = [_[0][0].upper() for _ in validTechniques]

    if conf.technique and isinstance(conf.technique, six.string_types):
        _ = []

        for letter in conf.technique.upper():
            if letter not in validLetters:
                errMsg = "value for --technique must be a string composed "
                errMsg += "by the letters %s. Refer to the " % ", ".join(validLetters)

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at lib/core/option.py:773 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of sqlmapproject/sqlmap@0a35b20e39 (2026-08-26). Data as JSON: /api/errors/e24c2ad477be6316. Report an issue: GitHub.