https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 14:28:47 +0000 https://vulnerability.circl.lu/vuln/cve-2026-84501 <p><strong>Affected:</strong> Apache Software Foundation Apache ZooKeeper</p> <p>An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper&#39;s operational log by sending a crafted add_auth(&#34;ensemble&#34;, ...) request containing newline characters (\n). When the ensemble name doesn&#39;t match, EnsembleAuthenticationProvider.handleAuthentication() logs the raw, unsanitized name via LOG.warn(). Because SLF4J&#39;s {} placeholder preserves embedded newlines, the attacker can forge complete log entries — with arbitrary timestamps, log levels, class names, and messages — that are visually indistinguishable from genuine ZooKeeper log output.</p> <p>This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.</p> <p>Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.</p> <p><strong>Affected:</strong> Apache Software Foundation Apache ZooKeeper</p> <p>An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper&#39;s operational log by sending a crafted add_auth(&#34;ensemble&#34;, ...) request containing newline characters (\n). When the ensemble name doesn&#39;t match, EnsembleAuthenticationProvider.handleAuthentication() logs the raw, unsanitized name via LOG.warn(). Because SLF4J&#39;s {} placeholder preserves embedded newlines, the attacker can forge complete log entries — with arbitrary timestamps, log levels, class names, and messages — that are visually indistinguishable from genuine ZooKeeper log output.</p> <p>This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.</p> <p>Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.</p> https://vulnerability.circl.lu/vuln/cve-2026-84501