CVE-2026-32733: Halloy is an IRC application written in Rust

Q: How do I fix CVE-2026-32733?

halloy: upgrade to newer than 2026.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-32733 being exploited?

CVE-2026-32733 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32733 affect?

CVE-2026-32733 affects halloy. Severity is medium (CVSS 6.5). 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 tra

Q: How urgent is CVE-2026-32733?

Priority 36/100. Public exploit reference

Routine

MEDIUM 6.5UPGRADE

CVE-2026-32733 is a medium-severity flaw (CVSS 6.5) affecting halloy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: halloy

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 23:16 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

halloy halloy UPGRADE

Affected: <= 2026.4

Fixed in: newer than 2026.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy halloy || rpm -q halloy || halloy --version

2. UPGRADE to newer than 2026.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade halloy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade halloy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32733?

halloy: upgrade to newer than 2026.4. Exact commands for each OS are on this page.

Is CVE-2026-32733 being exploited?

CVE-2026-32733 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32733 affect?

CVE-2026-32733 affects halloy. Severity is medium (CVSS 6.5). 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 tra

How urgent is CVE-2026-32733?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2026-32810 MEDIUM 5.5 UPGRADE Halloy is an IRC application written in Rust

References

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