🛡️ CVE-2026-10725
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-409 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb. Protocol::HTTP2's inbound HPACK path has no header-list size limit, so a small HTTP/2 request can expand into large server memory (the "HTTP/2 bomb"). The headers_decode method materialises a full key+value copy per indexed reference with no running size check, and the stream_header_block_add method appends (since version 1.12) every CONTINUATION frame to the per-stream buffer unbounded. MAX_HEADER_LIST_SIZE (default 65536) is advertised in SETTINGS but never consulted on decode. It is absent from the decoder and from the :limits export tag.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-409
Public Exploit ✅ No
Source NVD
Published 2026-06-06
Updated 2026-06-11
Modified 2026-06-10

Affected Packages

Software From version Fixed in
protocol\ — 1.13
unknown — —

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