CVE-2026-5557Network attack vector

Authenticated agent access via unrestricted Slack DMs

Published Apr 5, 2026 · Updated Apr 5, 2026

Authentication bypass in Pi Mom 0.58.0 through 0.58.4 allows remote authenticated users to invoke the Slack bot through direct messages. The Slack message handler routes every user-authored direct message to the agent without a user or channel allowlist. A Slack workspace account and direct-message access are required; successful requests reach an agent with file and command-execution tools.

CVSS severity6.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Pi Mom 0.58.0 through 0.58.4 allows remote authenticated users to invoke the Slack bot through direct messages. The Slack message handler routes every user-authored direct message to the agent without a user or channel allowlist. A Slack workspace account and direct-message access are required; successful requests reach an agent with file and command-execution tools.

The record

CVE
CVE-2026-5557
Published
Apr 5, 2026
Updated
Apr 5, 2026
Vendor
Earendil Inc.
Product
Pi
Classifications
CWE-288, CWE-287, T1078.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.58.0
  2. Affected versionversion=0.58.1
  3. Affected versionversion=0.58.2
  4. Affected versionversion=0.58.3
  5. Affected versionversion=0.58.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Earendil Inc. · Piversion=0.58.0; version=0.58.1; version=0.58.2; version=0.58.3; version=0.58.4

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
CWE-287Improper Authentication
T1078.004Valid Accounts: Cloud Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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