CVE-2026-32733 Halloy has a file transfer path traveral vulnerability
Remote attackers can write files outside the save directory via path traversal in DCC transfers, potentially overwriting sensitive files like SSH keys.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-32733?
CVE-2026-32733 is a high-severity path traversal vulnerability in squidowl halloy, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-32733?
It affects 1 product.
Products include Halloy Halloy.
How do I fix CVE-2026-32733?
No fix has been published for CVE-2026-32733 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-32733 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32733 exists.
Other vulnerabilities in squidowl halloy
Sources
Also known as GHSA-fqrv-rfg4-rv89.