Vulnerability Details CVE-2026-32733
Halloy is an IRC application written in Rust. Prior to commit 0f77b2cfc5f822517a256ea5a4b94bad8bfe38b6, the DCC receive flow did not sanitize filenames from incoming `DCC SEND` requests. A remote IRC user could send a filename with path traversal sequences like `../../.ssh/authorized_keys` and the file would be written outside the user's configured `save_directory`. With auto-accept enabled this required zero interaction from the victim. Starting with commit 0f77b2cfc5f822517a256ea5a4b94bad8bfe38b6, all identified code paths sanitize filenames through a shared `sanitize_filename` function.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.7%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-32733
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cpe:2.3:a:halloy:halloy:2023.2
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cpe:2.3:a:halloy:halloy:2023.3
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cpe:2.3:a:halloy:halloy:2023.4
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cpe:2.3:a:halloy:halloy:2023.5
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cpe:2.3:a:halloy:halloy:2024.1
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cpe:2.3:a:halloy:halloy:2024.10
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cpe:2.3:a:halloy:halloy:2024.11
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cpe:2.3:a:halloy:halloy:2024.12
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cpe:2.3:a:halloy:halloy:2024.13
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cpe:2.3:a:halloy:halloy:2024.14
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cpe:2.3:a:halloy:halloy:2024.2
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cpe:2.3:a:halloy:halloy:2024.3
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cpe:2.3:a:halloy:halloy:2024.4
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cpe:2.3:a:halloy:halloy:2024.5
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cpe:2.3:a:halloy:halloy:2024.6
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cpe:2.3:a:halloy:halloy:2024.7
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cpe:2.3:a:halloy:halloy:2024.8
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cpe:2.3:a:halloy:halloy:2024.9
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cpe:2.3:a:halloy:halloy:2025.1
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cpe:2.3:a:halloy:halloy:2025.10
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cpe:2.3:a:halloy:halloy:2025.11
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cpe:2.3:a:halloy:halloy:2025.12
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cpe:2.3:a:halloy:halloy:2025.2
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cpe:2.3:a:halloy:halloy:2025.3
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cpe:2.3:a:halloy:halloy:2025.4
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cpe:2.3:a:halloy:halloy:2025.5
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cpe:2.3:a:halloy:halloy:2025.6
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cpe:2.3:a:halloy:halloy:2025.7
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cpe:2.3:a:halloy:halloy:2025.8
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cpe:2.3:a:halloy:halloy:2025.9
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cpe:2.3:a:halloy:halloy:2026.1
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cpe:2.3:a:halloy:halloy:2026.1.1
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cpe:2.3:a:halloy:halloy:2026.2
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cpe:2.3:a:halloy:halloy:2026.3
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cpe:2.3:a:halloy:halloy:2026.4