{"record":{"id":"6004e5e45a7d909d","repo":"sqlmapproject/sqlmap","slug":"payload-carries-no-negatable-comparison","errorCode":null,"errorMessage":"payload carries no negatable comparison","messagePattern":"payload carries no negatable comparison","errorType":"exception","errorClass":"TimelessUnusable","httpStatus":null,"severity":"error","filePath":"lib/request/connect.py","lineNumber":1685,"sourceCode":"        # is in place before any payload is built), a boolean comparison is answered by relative HTTP/2\n        # response order instead of wall-clock timing - orders of magnitude faster and jitter-immune, and\n        # it skips the time-based statistical warm-up entirely. The comparison request is assembled exactly\n        # as it would be sent (buildOnly) and the bit is read from a coalesced pair. Not engaged -> timing.\n        if timeBasedCompare and kb.get(\"timeless\") is not None:\n            from lib.request.timeless import CONNECTIVITY_ERRORS\n            from lib.request.timeless import TimelessUnusable\n            from lib.request.timeless import disengage\n            from lib.request.timeless import negatePayload\n            # Build the condition and negation requests through the SAME path (queryPage buildOnly on the\n            # raw pre-placement value) so the pair differs ONLY by the negated comparison - building cond\n            # from the already-placed uri/get/post while neg goes through fresh placement would make them\n            # non-corresponding and flip the order.\n            negValue = negatePayload(timelessOrigValue)\n            try:\n                if negValue is None:\n                    # No sentinels (a tamper script mangled them, or a non-timeless vector slipped through):\n                    # the symmetric oracle cannot be built, and there is no calibrated alternative reading.\n                    raise TimelessUnusable(\"payload carries no negatable comparison\")\n                condSpec = Connect.queryPage(timelessOrigValue, place=place, buildOnly=True)\n                negSpec = Connect.queryPage(negValue, place=place, buildOnly=True)\n                return kb.timeless.readBitFromSpecs(condSpec, negSpec)\n            except CONNECTIVITY_ERRORS as ex:\n                # Either the oracle can no longer be trusted (a fresh connection failed calibration, the\n                # responses drifted off the calibrated control) or the target stopped negotiating HTTP/2\n                # altogether. Disengage - which restores the classic time-based vector - and answer this\n                # comparison the wall-clock way instead of crashing the scan. The payload in flight was\n                # forged from the heavy (millisecond) vector, so it has to be re-forged onto the restored\n                # one first: re-sending it as-is would read False whatever the truth.\n                warnMsg = \"HTTP/2 timeless timing is no longer reliable ('%s'). Falling back to classic time-based\" % getSafeExString(ex)\n                singleTimeWarnMessage(warnMsg)\n                disengage()\n                # Re-run this comparison the wall-clock way. The payload in flight was forged from the\n                # heavy (millisecond) vector, so re-sending it as-is would read False whatever the truth -\n                # the straggler rewrite at the top of queryPage puts it back on the restored vector, the\n                # same way it will handle the rest of this value.\n                if kb.get(\"timelessRestore\"):","sourceCodeStart":1667,"sourceCodeEnd":1703,"githubUrl":"https://github.com/sqlmapproject/sqlmap/blob/0a35b20e3953d341be6c7ac75ccb0b3362540c8d/lib/request/connect.py#L1667-L1703","documentation":"Error \"payload carries no negatable comparison\" thrown in sqlmapproject/sqlmap.","triggerScenarios":"Thrown at lib/request/connect.py:1685 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0a35b20e3953d341be6c7ac75ccb0b3362540c8d","analyzedAt":"2026-08-26T23:02:52.002Z","schemaVersion":2},"datasetVersion":"2026-08-27T03:17:27.898Z"}