{"id":"CVE-2026-10725","state":"PUBLISHED","title":"Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb","description":"Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb.\n\nProtocol::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\").\n\nThe 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.\n\nMAX_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.","publishedAt":"2026-06-06T09:14:45.652Z","updatedAt":"2026-06-09T07:20:32.184Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"CPANSec","products":["CRUX Protocol::HTTP2"],"affected":[{"vendor":"CRUX","product":"Protocol::HTTP2","packageName":"Protocol-HTTP2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.13","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programRoutines":[{"name":"Protocol::HTTP2::HeaderCompression::headers_decode"},{"name":"Protocol::HTTP2::Stream::stream_header_block_add"}],"repo":"https://github.com/vlet/p5-Protocol-HTTP2"}],"references":["https://metacpan.org/release/CRUX/Protocol-HTTP2-1.13/changes","https://metacpan.org/release/CRUX/Protocol-HTTP2-1.12/source/lib/Protocol/HTTP2/HeaderCompression.pm#L133","https://metacpan.org/release/CRUX/Protocol-HTTP2-1.12/source/lib/Protocol/HTTP2/Stream.pm#L414","https://github.com/vlet/p5-Protocol-HTTP2/commit/822bf22224adbd662e8d0b865eeacb2b294d16cd.patch","https://security.metacpan.org/patches/P/Protocol-HTTP2/1.12/CVE-2026-10725-r2.patch","http://www.openwall.com/lists/oss-security/2026/06/06/7"],"weaknesses":["CWE-409"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/10xxx/CVE-2026-10725.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10725","state":"PUBLISHED","datePublished":"2026-06-06T09:14:45.652Z","dateUpdated":"2026-06-09T07:20:32.184Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-06-03T09:18:37.572Z"},"containers":{"cna":{"title":"Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb","descriptions":[{"lang":"en","value":"Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb.\n\nProtocol::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\").\n\nThe 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.\n\nMAX_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."}],"affected":[{"vendor":"CRUX","product":"Protocol::HTTP2","packageName":"Protocol-HTTP2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.13","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programRoutines":[{"name":"Protocol::HTTP2::HeaderCompression::headers_decode"},{"name":"Protocol::HTTP2::Stream::stream_header_block_add"}],"repo":"https://github.com/vlet/p5-Protocol-HTTP2"}],"references":[{"url":"https://metacpan.org/release/CRUX/Protocol-HTTP2-1.13/changes","tags":["release-notes"]},{"url":"https://metacpan.org/release/CRUX/Protocol-HTTP2-1.12/source/lib/Protocol/HTTP2/HeaderCompression.pm#L133"},{"url":"https://metacpan.org/release/CRUX/Protocol-HTTP2-1.12/source/lib/Protocol/HTTP2/Stream.pm#L414"},{"url":"https://github.com/vlet/p5-Protocol-HTTP2/commit/822bf22224adbd662e8d0b865eeacb2b294d16cd.patch","tags":["patch"]},{"url":"https://security.metacpan.org/patches/P/Protocol-HTTP2/1.12/CVE-2026-10725-r2.patch","tags":["patch"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-409","description":"CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-06-09T07:20:32.184Z"},"source":{"discovery":"UNKNOWN"},"workarounds":[{"lang":"en","value":"Apply the patch."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/06/06/7"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-06T11:31:33.020Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-08T18:12:28.230486Z","id":"CVE-2026-10725","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-08T18:12:32.557Z"}}]}}}