sqlmapproject/sqlmap · error · H2CompressionError

dynamic table size exceeds advertised maximum

Error message

dynamic table size exceeds advertised maximum

What it means

Error "dynamic table size exceeds advertised maximum" thrown in sqlmapproject/sqlmap.

Source

Thrown at lib/request/http2.py:498

                index, pos = decode_integer(data, pos, 7)
                name, value = self._get(index)
                headers.append((name, value))
            elif first & 0x40:
                saw_header = True
                index, pos = decode_integer(data, pos, 6)
                if index:
                    name = self._get(index)[0]
                else:
                    name, pos = decode_string(data, pos)
                value, pos = decode_string(data, pos)
                self._add(name, value)
                headers.append((name, value))
            elif first & 0x20:
                if saw_header:
                    raise H2CompressionError("dynamic table size update is not at block start")
                new_size, pos = decode_integer(data, pos, 5)
                if new_size > self.max_allowed_size:
                    raise H2CompressionError("dynamic table size exceeds advertised maximum")
                self.max_size = new_size
                self._evict()
                continue
            else:
                saw_header = True
                index, pos = decode_integer(data, pos, 4)
                if index:
                    name = self._get(index)[0]
                else:
                    name, pos = decode_string(data, pos)
                value, pos = decode_string(data, pos)
                headers.append((name, value))

            name, value = headers[-1]
            list_size += self._entry_size(name, value)
            if list_size > self.max_header_list_size:
                raise H2CompressionError("decoded header list exceeds configured limit")
        return headers

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at lib/request/http2.py:498 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/54ecc811835b158f. Report an issue: GitHub.