CVE catalog

CVE-2026-10725

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 serve

[CVE catalog]

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.41% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianlibprotocol-http2-perlsid1.14-1fixed
Debianlibprotocol-http2-perlforky1.14-1fixed
Debianlibprotocol-http2-perltrixie1.11-1vulnerable
Debianlibprotocol-http2-perlbookworm1.10-2vulnerable
Cpelibprotocol-http2-perlNot reportedNot reportedvulnerable
Cpeprotocol\Not reported1.13fixed
Opensuseperl-Protocol-HTTP2leap 16.01.10-160000.3.1fixed
Suseperl-Protocol-HTTP2linux enterprise server 16.01.10-160000.3.1fixed
Suseperl-Protocol-HTTP2linux enterprise server for sap applications 16.01.10-160000.3.1fixed
Ubuntulibprotocol-http2-perl18.041.08-1vulnerable
Ubuntulibprotocol-http2-perl20.041.09-1vulnerable
Ubuntulibprotocol-http2-perl20.041.10-1vulnerable
Ubuntulibprotocol-http2-perl22.041.10-1vulnerable
Ubuntulibprotocol-http2-perl24.041.10-3vulnerable
Ubuntulibprotocol-http2-perl25.101.11-1vulnerable
Ubuntulibprotocol-http2-perl26.041.11-1vulnerable
Opensuseperl-Protocol-HTTP2tumbleweed1.130.0-1.1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianlibprotocol-http2-perlsourcesid1.12-2not yet assignedNot reportedNot reported
Debianlibprotocol-http2-perlsourceforky1.12-2not yet assignedNot reportedNot reported
Debianlibprotocol-http2-perlsourcetrixie(unfixed)not yet assignedNot reportedNot reported
Debianlibprotocol-http2-perlsourcebookworm(unfixed)not yet assignedNot reportedNot reported
Cpeprotocol\cpeNot reported1.13Not reportedNot reportedNot reported
Opensuseperl-Protocol-HTTP2rpmleap 16.01.10-160000.3.1Not reportedOPENSUSE-SU-2026:21125-1Not reported
Suseperl-Protocol-HTTP2rpmlinux enterprise server 16.01.10-160000.3.1Not reportedSUSE-SU-2026:22188-1Not reported
Suseperl-Protocol-HTTP2rpmlinux enterprise server for sap applications 16.01.10-160000.3.1Not reportedSUSE-SU-2026:22188-1Not reported
Opensuseperl-Protocol-HTTP2rpmtumbleweed1.130.0-1.1Not reportedOPENSUSE-SU-2026:10988-1Not reported

Notes

[trixie] libprotocol-http2-perl: Minor issue [bookworm] libprotocol-http2-perl: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [libprotocol-http2-perl]Affected
    Details (2)

    • 1.10-2 · all · bookworm

      Affected

      nvd · libprotocol-http2-perl · debian · bookworm; nvd · libprotocol-http2-perl · debian · 12

    • 1.10-2 · all · bookworm

      Affected

      nvd · libprotocol-http2-perl · debian · bookworm; nvd · libprotocol-http2-perl · debian · 12

[Debian 13 (Trixie)]

  • [libprotocol-http2-perl]Affected
    Details (2)

    • 1.11-1 · all · trixie

      Affected

      nvd · libprotocol-http2-perl · debian · 13

    • 1.11-1 · all · trixie

      Affected

      nvd · libprotocol-http2-perl · debian · 13

[openSUSE Tumbleweed]

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]