Upstream information
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.
SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (CISA-ADP) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
SUSE Security Advisories:
- SUSE-SU-2026:2306-1, published 2026-06-09T07:58:46Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Module for Package Hub 15 SP7 |
| Patchnames: SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-2306 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | perl-Protocol-HTTP2 | Released |
| SUSE Linux Enterprise Server 16.0 | perl-Protocol-HTTP2 | In progress |
| SUSE Linux Enterprise Server 16.1 | perl-Protocol-HTTP2 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | perl-Protocol-HTTP2 | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.1 | perl-Protocol-HTTP2 | Affected |
| openSUSE Leap 16.0 | perl-Protocol-HTTP2 | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | perl-Protocol-HTTP2 | Affected |
| openSUSE Leap 15.6 | perl-Protocol-HTTP2 | Released |
SUSE Timeline for this CVE
CVE page created: Sat Jun 6 12:00:56 2026CVE page last modified: Tue Jun 9 15:24:05 2026