sqlmapproject/sqlmap · error · SqlmapUnsupportedFeatureException

option '--charset' is not supported on '%s'

Error message

option '--charset' is not supported on '%s'

What it means

Error "option '--charset' is not supported on '%s'" thrown in sqlmapproject/sqlmap.

Source

Thrown at lib/techniques/blind/inference.py:943

                                        errMsg = "unable to properly validate last character value ('%s').." % decodeIntToUnicode(retVal)
                                        logger.error(errMsg)
                                        conf.timeSec = kb.originalTimeDelay
                                        return decodeIntToUnicode(retVal)
                                else:
                                    if timeBasedCompare:
                                        threadData.validationRun += 1
                                        if kb.adjustTimeDelay is ADJUST_TIME_DELAY.NO and threadData.validationRun > VALID_TIME_CHARS_RUN_THRESHOLD:
                                            dbgMsg = "turning back on time auto-adjustment mechanism"
                                            logger.debug(dbgMsg)
                                            kb.adjustTimeDelay = ADJUST_TIME_DELAY.YES

                                    return decodeIntToUnicode(retVal)
                            else:
                                return None
            else:
                if "'%s'" % CHAR_INFERENCE_MARK in payload and conf.charset:
                    errMsg = "option '--charset' is not supported on '%s'" % Backend.getIdentifiedDbms()
                    raise SqlmapUnsupportedFeatureException(errMsg)

                candidates = list(originalTbl)
                bit = 0
                while len(candidates) > 1:
                    bits = {}
                    maxCandidate = max(candidates)
                    maxBits = maxCandidate.bit_length() if maxCandidate > 0 else 1

                    for candidate in candidates:
                        for bit in xrange(maxBits):
                            bits.setdefault(bit, 0)
                            if candidate & (1 << bit):
                                bits[bit] += 1
                            else:
                                bits[bit] -= 1

                    choice = sorted(bits.items(), key=lambda _: abs(_[1]))[0][0]
                    mask = 1 << choice

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at lib/techniques/blind/inference.py:943 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/22559dda42731e3d. Report an issue: GitHub.