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CVE-2026-50642 is an improper output neutralization vulnerability in diff-so-fancy affecting versions through 1.4.10. The application sanitizes ANSI Select Graphic Rendition sequences but fails to neutralize other terminal control characters and escape sequences before rendering diff data to the terminal. As a result, carriage returns and non-SGR escape sequences such as OSC and CSI can be embedded in filenames, diff metadata, or file contents and then emitted directly during diff viewing. This allows attacker-controlled diff content to manipulate terminal rendering and user perception during review workflows.
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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.
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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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Improper Encoding or Escaping of Output vulnerability affecting diff-so-fancy software.
An improper output sanitization vulnerability in diff-so-fancy that allows non-SGR terminal control sequences to pass through unsanitized, enabling output manipulation such as filename spoofing, terminal screen clearing, clipboard injection, and potentially unintended command execution through clipboard hijacking.
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.