CVE-2026-79993

A flaw was found in Apache ZooKeeper. The deleteContainer opcode is processed without verifying Access Control List ACL permissions. A remote, unauthenticated attacker with network access to the ZooKeeper client port can delete any empty persistent znode, including container and TTL nodes. This c...

CLEANSTART-2026-ZA11117 unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth("ensemble",

CVE-2026-84501 affects multiple packages. An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted addauth"ensemble",. See references for individual vulnerability details...

CLEANSTART-2026-XH38250 Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments

CVE-2026-59969 affects multiple packages. Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments. See references for individual vulnerability details...

CLEANSTART-2026-YK34202 Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check

CVE-2026-59739 affects multiple packages. Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check. See references for individual vulnerability details...

CLEANSTART-2026-JQ32755 Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments

Security vulnerability affects the spark package. Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments...

CLEANSTART-2026-QQ07895 unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth("ensemble",

Security vulnerability affects the spark package. An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted addauth"ensemble",...

CLEANSTART-2026-JM28284 Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check

Security vulnerability affects the spark package. Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check...

Security Bulletin: Multiple Vulnerabilities in IBM Concert Operate / IBM Cloud Pak for AIOps

Summary Multiple vulnerabilities were addressed in IBM Concert Operate version 5.2.0 Vulnerability Details CVEID:CVE-2026-24281 DESCRIPTION: Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS PTR when IP SAN validation fails, allowing attackers who control or spoof...

CLEANSTART-2026-ML04549 Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check

Security vulnerability affects the apache-hive package. Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check...

CLEANSTART-2026-QE83789 Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments

Security vulnerability affects the apache-hive package. Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments...

CLEANSTART-2026-KR26174 unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth("ensemble",

Security vulnerability affects the apache-hive package. An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted addauth"ensemble",...

CVE-2026-84501

A flaw was found in Apache ZooKeeper. An unauthenticated attacker can inject arbitrary fake log lines into the operational log by sending a specially crafted request containing newline characters. This vulnerability allows the attacker to forge complete log entries, including timestamps, log...

CVE-2026-59969

A flaw was found in Apache ZooKeeper. When operating in FIPS Federal Information Processing Standards mode with specific Transport Layer Security TLS settings enabled, ZooKeeper's quorum communication fails to properly verify the hostname of peer certificates. This vulnerability allows a maliciou...

CVE-2026-59739

A flaw was found in Apache ZooKeeper. This vulnerability allows a remote attacker to discover paths that should be restricted by Access Control Lists ACLs. By registering watches on non-existent paths and then reconnecting after these paths are created with restricted ACLs, the attacker can bypas...

BIT-ZOOKEEPER-2026-84501 Apache ZooKeeper: Operational log forgery via newline injection in EnsembleAuthenticationProvider

An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted addauth"ensemble", ... request containing newline characters \n. When the ensemble name doesn't match, EnsembleAuthenticationProvider.handleAuthentication logs the raw,...

BIT-ZOOKEEPER-2026-79993 Apache ZooKeeper: Missing ACL check on deleteContainer opcode allows unauthorized deletion of any empty persistent/container znode

The deleteContainer opcode 0x14/20 is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its parent. This opcode is considered internal-only and the official clie...

BIT-ZOOKEEPER-2026-84439 Apache ZooKeeper: Audit log injection via unsanitized output from multiple sources

When audit logging is enabled zookeeper.audit.enable=true, an unauthenticated attacker can inject arbitrary fields into Apache ZooKeeper's audit log by sending a digest authentication request with tab characters \t embedded in the username. Because the audit log uses tab-separated key=value forma...

BIT-ZOOKEEPER-2026-59969 Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode

Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments. When sslQuorum=true, zookeeper.fips-mode=true, ssl.quorum.hostnameVerification=true, and ssl.quorum.clientHostnameVerification=true are enabled, the Java SSLSocket quorum path accepts a CA-trusted pe...

BIT-ZOOKEEPER-2026-59739 Apache ZooKeeper: Information disclosure via SetWatches reconnect replay

Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check. An attacker can discover ACL-restricted paths by registering exists-watches on non-existent paths, then reconnecting after the paths are created with restricted ACLs. Issue is caused by incomplete...

PT-2026-95845

The deleteContainer opcode 0x14/20 is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its parent. This opcode is considered internal-only and the official clie...