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CVE-2026-0394 is a path-traversal vulnerability in Dovecot's passwd-file passdb when per-domain passwd files are selected using the %d domain expansion. An attacker-controlled domain component can traverse outside the intended base directory when per-domain passwd files are placed in an unsafe relative location or when slash is permitted in domain input. The flaw can cause Dovecot to open an unintended file whose name ends in “passwd” before authentication.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A moderate-severity vulnerability referenced by an AlmaLinux 9.6 local security check. The supplied content identifies it only by CVE and provides no technical description of the underlying flaw or affected package.
A moderate-severity vulnerability referenced by a Rocky Linux 9.6 local security-check plugin. The provided CVSS vector indicates network-accessible exposure requiring no privileges or user interaction, with low confidentiality impact and no stated integrity or availability impact.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.