sqlmapproject/sqlmap · error · H2ProtocolError

HEADERS padding exceeds frame payload

Error message

HEADERS padding exceeds frame payload

What it means

Error "HEADERS padding exceeds frame payload" thrown in sqlmapproject/sqlmap.

Source

Thrown at lib/request/http2.py:820

    return frames


def _extract_header_fragment(ftype, flags, payload):
    if ftype == CONTINUATION:
        return payload
    pos = 0
    pad_length = 0
    if flags & FLAG_PADDED:
        if not payload:
            raise H2ProtocolError("padded HEADERS frame has no pad length")
        pad_length = bytearray(payload)[0]
        pos = 1
    if flags & FLAG_PRIORITY:
        if len(payload) - pos < 5:
            raise H2ProtocolError("truncated HEADERS priority fields")
        pos += 5
    if pad_length > len(payload) - pos:
        raise H2ProtocolError("HEADERS padding exceeds frame payload")
    end = len(payload) - pad_length
    return payload[pos:end]


def _extract_data(flags, payload):
    if not (flags & FLAG_PADDED):
        return payload
    if not payload:
        raise H2ProtocolError("padded DATA frame has no pad length")
    pad_length = bytearray(payload)[0]
    if pad_length > len(payload) - 1:
        raise H2ProtocolError("DATA padding exceeds frame payload")
    return payload[1:len(payload) - pad_length]


def _parse_content_length(headers, trailers=False):
    values = []
    for name, value in headers:

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at lib/request/http2.py:820 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/f7b90ad7f81980ea. Report an issue: GitHub.