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Apache disclosed two high-severity denial-of-service vulnerabilities in Apache Neethi affecting versions before 3.2.2. CVE-2026-42402 allows specially crafted WS-Policy documents to trigger exponential Cartesian cross-product expansion during policy normalization, leading to unbounded memory allocation, JVM heap exhaustion, and application crashes or stalls. Apache said the issue is fixed in version 3.2.2 by limiting the maximum number of normalized policy alternatives.
Apache also disclosed CVE-2026-42403, which stems from improper detection of circular references in WS-Policy definitions. A malicious policy document can force infinite looping or excessive recursion during normalization, potentially causing stack overflows or application hangs. Apache recommends upgrading to 3.2.2 to address both flaws.
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3 events from the most recent confirmed update back to the earliest known activity.
Apache publicly disclosed CVE-2026-42403, a high-severity denial-of-service vulnerability in Apache Neethi caused by improper handling of circular references in WS-Policy definitions. A malicious policy document can trigger infinite looping or excessive recursion during normalization, potentially causing stack overflow or application hangs.
Apache publicly disclosed CVE-2026-42402, a high-severity denial-of-service vulnerability in Apache Neethi caused by algorithmic complexity in WS-Policy normalization. Specially crafted policy documents can trigger exponential expansion, exhaust JVM heap memory, and crash or stall applications.
Apache addressed two high-severity denial-of-service flaws in Apache Neethi by releasing version 3.2.2 for affected versions before 3.2.2. The fixes mitigate unbounded resource allocation during WS-Policy normalization (CVE-2026-42402) and infinite looping from circular policy references (CVE-2026-42403).
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Apache disclosed two vulnerabilities affecting multiple **ActiveMQ** components, including Client, Broker, and bundled distributions. **CVE-2026-33227** is a low-severity pathname restriction flaw that lets an authenticated user manipulate a supplied `key` value to traverse the classpath in two cases: when creating a **STOMP** consumer and when browsing messages through the web console. Apache warned the issue could expose classpath resource loading and potentially be chained with another attack. The flaw affects the 5.x branch before **5.19.3** and the 6.x branch from **6.0.0** before **6.2.2**, but Apache said those initial fixes were incomplete on Windows because of path separator handling, and recommended upgrading instead to **5.19.4** or **6.2.3**. Apache also published **CVE-2026-39304**, an important denial-of-service flaw in ActiveMQ's **NIO SSL transports** caused by incorrect handling of **TLS 1.3 `KeyUpdate`** messages. A client can repeatedly trigger updates and exhaust broker memory in the SSL engine, causing out-of-memory crashes and service disruption. Apache added that related handshake handling is also broken for earlier TLS versions such as **TLS 1.2**, though those cases lead to hung connections rather than memory exhaustion. The DoS issue affects the 5.x branch before **5.19.4** and the 6.x branch from **6.0.0** before **6.2.4**; users are advised to upgrade to **5.19.5** or **6.2.4**.
Jun 29, 2026
Apache HTTP Server disclosed **CVE-2026-23918**, a high-severity double-free flaw in `mod_http2` affecting version `2.4.66`, with researchers showing it can be triggered remotely over a single TCP connection by sending crafted HTTP/2 frames on the same stream. The bug stems from the same `h2_stream` object being queued twice for cleanup, causing a second `apr_pool_destroy` on freed memory; on multi-threaded MPM deployments such as **event** and **worker**, this can reliably crash worker processes without authentication, while **prefork** is not affected. Public reporting said denial-of-service is the most practical near-term outcome, but under specific conditions the memory corruption can be developed into pre-authenticated remote code execution. Apache fixed the issue in **version 2.4.67** by preventing duplicate cleanup entries and urged administrators to upgrade immediately. Guidance published alongside the disclosure recommended temporarily disabling **HTTP/2** where patching is delayed, using rate limiting or a WAF to reduce opportunistic abuse, and reviewing exposure from related modules after the same release also patched flaws in `mod_rewrite`, `mod_proxy_ajp`, `mod_md`, and `mod_dav_lock`. At the time of publication, sources said there was **no confirmed in-the-wild exploitation**, but warned that Apache HTTP Server's broad deployment and common `mod_http2` enablement make internet-facing systems attractive targets.
Jun 29, 2026
Apache released security updates for its Syncope identity and access management platform to fix multiple vulnerabilities across the 3.0, 4.0, and 4.1 branches, including remote code execution, SQL injection, privilege escalation, SSRF, information disclosure, XXE, XSS, and cryptographic weaknesses. The most severe issues include several Groovy-related post-authentication RCE flaws, while `CVE-2026-57308` affects Audit Events search through an unsanitized sort parameter that can enable authenticated SQL injection, and `CVE-2026-62183` can let a regular user elevate privileges through certain self-service workflow configurations and obtain administrator-level entitlements. Affected releases include Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.6, and 4.1.0-M0 through 4.1.1 for the newly disclosed SQL injection and privilege escalation bugs, with Apache delivering fixes in versions **4.0.7** and **4.1.2** and noting that some older flaws were addressed in earlier point releases such as **4.1.1**, **4.0.6**, **4.0.4**, **4.0.3**, **3.0.16**, and **3.0.15**. Apache said binary hotfixes are not available, requiring organizations to upgrade or rebuild from patched source, and urged administrators to review roles, entitlements, and self-service workflows; no public exploitation has been confirmed.
Jul 24, 2026