H2O ImportFiles - Local File Inclusion

An attacker is able to read any file on the server hosting the H2O dashboard without any authentication. id: CVE-2023-6038 info: name: H2O ImportFiles - Local File Inclusion author: danmcinerney,byt3bl33d3r severity: high description: | An attacker is able to read any file on the server hosting t...

PYSEC-2026-352 H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URL

H2O.ai H2O through 3.46.0.4 allows attackers to arbitrarily set the JDBC URL, leading to deserialization attacks, file reads, and command execution. Exploitation can occur when an attacker has access to post to the ImportSQLTable URI with a JSON document containing a connectionurl property with a...

PYSEC-2026-349 H2O affected by a deserialization vulnerability

A deserialization vulnerability exists in h2oai/h2o-3 versions = 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and...

PYSEC-2026-351 H2O Deserialization of Untrusted Data Vulnerability

A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are...

FreeBSD : h2o -- stack overflow serving static files on musl libc (644d5e6c-1bd9-4904-8440-16c04100a2e1)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 644d5e6c-1bd9-4904-8440-16c04100a2e1 advisory. h2o project reports: When serving static files, h2o can allocate a file path on the stack using alloca...

FreeBSD : h2o -- HTTP/2 state amplification denial of service (35c57495-2231-4733-a66e-044f3dad8b21)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 35c57495-2231-4733-a66e-044f3dad8b21 advisory. h2o project reports: An HTTP/2 attack can combine HPACK decompression state amplification with stalled...

FreeBSD : h2o -- heap overrun parsing zero-length SNI (fba766f4-ccda-4e1b-8875-ab857c6a6532)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the fba766f4-ccda-4e1b-8875-ab857c6a6532 advisory. h2o project reports: When h2o receives a TLS or QUIC ClientHello containing a zero-length SNI extension...

ai.chronon:service_2.11 (>=0.0.86 <=def544ccef5f753238ecc4adfc2eaa7d2fc36d53-0.0.91), ai.chronon:service_2.12 (>=0.0.86 <=def544ccef5f753238ecc4adfc2eaa7d2fc36d53-0.0.91) +2498 more potentially affected by CVE-2026-46340 via io.netty:netty-transport-sctp (>=4.0.0.Beta1 <=4.1.134.Final)

io.netty:netty-transport-sctp MAVEN version =4.0.0.Beta1, =0.0.86, =0.0.86, =0.0.86, =3.30.1.1, =3.10.0.5, =0.2.3.5, =0.0.1, =2.0.24, =1.1.9, =0.0.1, =0.0.9 and more Source cves: CVE-2026-46340 Source advisory: OSV:GHSA-5XRH-QMMQ-W6CH...

ai.h2o:h2o-algos (=0.1.9), ai.h2o:h2o-app (=0.1.9) +2053 more potentially affected by CVE-2026-45536 via io.netty:netty-transport-native-kqueue (>=4.1.11.Final <=4.1.134.Final)

io.netty:netty-transport-native-kqueue MAVEN version =4.1.11.Final, =3.30.1.1, =3.10.0.5, =0.2.3.5, =0.1.0, =0.0.1, =2.4.0, =1.5.0, =3.0.0, =3.0.0, =3.0.1 and more Source cves: CVE-2026-45536 Source advisory: OSV:GHSA-W573-9FFJ-6FF9...

CVE-2026-3960

A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific...

h2o-notebook (>=0.3.0 <=0.4.1) potentially affected by CVE-2026-44182 via jupyter-enterprise-gateway (=3.2.2)

jupyter-enterprise-gateway PYPI version =3.2.2 is affected by a known vulnerability. The following packages have a transitive dependency on jupyter-enterprise-gateway and may be impacted: - h2o-notebook =0.3.0, =0.4.1 Source cves: CVE-2026-44182 Source advisory: OSV:GHSA-CFW7-6C5V-2WJQ...

h2o-notebook (>=0.3.0 <=0.4.1) potentially affected by CVE-2026-44181 via jupyter-enterprise-gateway (=3.2.2)

jupyter-enterprise-gateway PYPI version =3.2.2 is affected by a known vulnerability. The following packages have a transitive dependency on jupyter-enterprise-gateway and may be impacted: - h2o-notebook =0.3.0, =0.4.1 Source cves: CVE-2026-44181 Source advisory: OSV:GHSA-F49J-V924-FX9W...

h2o-notebook (>=0.3.0 <=0.4.1) potentially affected by CVE-2026-44180 via jupyter-enterprise-gateway (=3.2.2)

jupyter-enterprise-gateway PYPI version =3.2.2 is affected by a known vulnerability. The following packages have a transitive dependency on jupyter-enterprise-gateway and may be impacted: - h2o-notebook =0.3.0, =0.4.1 Source cves: CVE-2026-44180 Source advisory: OSV:GHSA-CHQ7-94J8-CJ28...

CVE-2026-8752

A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access...

CVE-2026-8751

A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The...

CVE-2026-8750

A vulnerability was identified in h2oai h2o-3 up to 7402. Affected by this issue is the function importFiles of the file h2o-core/src/main/java/water/persist/PersistNFS.java of the component ImportFile API. Such manipulation leads to information disclosure. The attack can be executed remotely. Th...

ai.h2o:h2o-admissibleml (>=3.34.0.1 <=3.46.0.11), ai.h2o:h2o-algos (>=0.1.9 <=3.46.0.11) +49 more potentially affected by CVE-2026-8750 via ai.h2o:h2o-core (>=0.1.10 <=3.8.3.4)

ai.h2o:h2o-core MAVEN version =0.1.10, =3.34.0.1, =0.1.9, =0.1.9, =3.12.0.1, =3.8.2.4, =3.14.0.7, =3.16.0.1, =3.14.0.1, =3.24.0.1, =3.30.1.1, =3.26.0.4, =3.10.5.1, =3.24.0.1, =3.30.0.1, =3.34.0.3, =3.46.0.11 and more Source cves: CVE-2026-8750 Source advisory: SNYK:JAVA-AIH2O-17191772...

ai.h2o:h2o-admissibleml (>=3.34.0.1 <=3.46.0.11), ai.h2o:h2o-algos (>=0.1.9 <=3.46.0.11) +49 more potentially affected by CVE-2026-8751 via ai.h2o:h2o-core (>=0.1.10 <=3.8.3.4)

ai.h2o:h2o-core MAVEN version =0.1.10, =3.34.0.1, =0.1.9, =0.1.9, =3.12.0.1, =3.8.2.4, =3.14.0.7, =3.16.0.1, =3.14.0.1, =3.24.0.1, =3.30.1.1, =3.26.0.4, =3.10.5.1, =3.24.0.1, =3.30.0.1, =3.34.0.3, =3.46.0.11 and more Source cves: CVE-2026-8751 Source advisory: SNYK:JAVA-AIH2O-17191958...

CVE-2026-8752

A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access...

CVE-2026-8751

A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The...