CVE-2026-5557 badlogic pi-mono pi-mom Slack Bot slack.ts authentication bypass
An attacker can bypass authentication in the pi-mono Slack Bot component via an alternate channel, potentially gaining unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5557?
CVE-2026-5557 is a medium-severity authentication bypass vulnerability in badlogic pi-mono, published on 5 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in badlogic pi-mono up to 0.58.4. This issue affects some unknown processing of the file packages/mom/src/slack.ts of the component pi-mom Slack Bot. The manipulation results in authentication bypass using alternate channel. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-5557?
How do I fix CVE-2026-5557?
No fix has been published for CVE-2026-5557 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-5557 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5557 exists.
Sources
Also known as GHSA-vm3q-w7cc-43ff.