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CVE-2026-57233 is a path traversal vulnerability in the WinGup updater component used by Notepad++ before version 8.9.7. The flaw is in the decompress logic, which concatenates untrusted ZIP entry names to the extraction destination without canonical path containment validation. By supplying a crafted archive containing traversal sequences, an attacker can cause extraction outside the intended directory and overwrite files in adjacent locations, including plugin-related DLLs. If a targeted plugin DLL is overwritten, attacker-controlled code can execute when Notepad++ subsequently loads the affected plugin.
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No public exploit code observed for this vulnerability.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A recently referenced vulnerability affecting Notepad++ that the poster says requires an upgrade. No technical details are provided in the content.
A path traversal vulnerability in Notepad++ WinGup's ZIP decompression/update handling that can allow overwriting a DLL in a sibling plugin directory, leading to attacker-controlled code execution when the plugin is later loaded.
Path traversal vulnerability in the WinGup auto-update component of Notepad++ caused by improper validation of paths inside ZIP archives during plugin package extraction, enabling arbitrary file write and possible arbitrary code execution.
A Zip Slip path traversal vulnerability in the WinGUp updater component of Notepad++ that could allow arbitrary file overwrite during update extraction.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.