Bug 2485660 (CVE-2026-10725) - CVE-2026-10725 Protocol::HTTP2: Protocol::HTTP2: Denial of Service via HTTP/2 Bomb
Summary: CVE-2026-10725 Protocol::HTTP2: Protocol::HTTP2: Denial of Service via HTTP/2...
Keywords:
Status: NEW
Alias: CVE-2026-10725
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2488904
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-06 10:01 UTC by OSIDB Bzimport
Modified: 2026-06-15 17:46 UTC (History)
0 users

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Description OSIDB Bzimport 2026-06-06 10:01:15 UTC 
Protocol::HTTP2 versions through 1.12 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.
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