Improper handling of multiline messages in node-irc affects matrix-appservice-irc
matrix-appservice-irc provides an IRC bridge for Matrix. The vulnerability in node-irc allows an attacker to manipulate a Matrix user into executing IRC commands by having them reply to a maliciously crafted message. The vulnerability has been patched in matrix-appservice-irc 0.33.2. In terms of a workaround, users should refrain from replying to messages from untrusted participants in IRC-bridged Matrix rooms.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | matrix-appservice-irc | < 0.33.2 | 0.33.2 |
References
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-37hr-348p-rmf4
- https://github.com/matrix-org/node-irc/security/advisories/GHSA-52rh-5rpj-c3w6
- https://nvd.nist.gov/vuln/detail/CVE-2022-29166
- https://github.com/matrix-org/matrix-appservice-irc
- https://matrix.org/blog/2022/05/04/0-34-0-security-release-for-matrix-appservice-irc-high-severity
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-74- Platform
- npm
- Package
matrix-appservice-irc- Disclosed
- 23.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-37hr-348p-rmf4 - CC BY 4.0
Vulnerability history: matrix-appservice-irc
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 9
- First → latest
- 05.2022 02.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 5
- Low 2
Disclosures per year
- 2022: 4
- 2023: 2
- 2024: 2
- 2025: 1
- 2026: 0
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