CVE-2026-55432Network attack vector

Public app exposure via unchecked sharing level

Published Jul 8, 2026 · Updated Jul 8, 2026

Missing authorization in Coder allows remote authenticated users to expose workspace apps publicly through sub-agent registration. The CreateSubAgent RPC persists the requested sharing level without comparing it with the template's MaxPortSharingLevel, allowing PUBLIC access despite an owner-only policy. Exploitation requires a workspace owner with an agent token, Enterprise port-sharing policy, and wildcard app hostnames; unauthenticated users can then reach the registered app.

CVSS severity5.4
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Coder allows remote authenticated users to expose workspace apps publicly through sub-agent registration. The CreateSubAgent RPC persists the requested sharing level without comparing it with the template's MaxPortSharingLevel, allowing PUBLIC access despite an owner-only policy. Exploitation requires a workspace owner with an agent token, Enterprise port-sharing policy, and wildcard app hostnames; unauthenticated users can then reach the registered app.

The record

CVE
CVE-2026-55432
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Coder
Product
Coder
Classifications
CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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=< 2.29.17
  2. Affected versionversion=>= 2.30.0, < 2.32.7
  3. Affected versionversion=>= 2.33.0, < 2.33.8
  4. Affected versionversion=>= 2.34.0, < 2.34.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Coder · Coderversion=< 2.29.17; version=>= 2.30.0, < 2.32.7; version=>= 2.33.0, < 2.33.8; version=>= 2.34.0, < 2.34.2

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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-862Missing Authorization
T1190Exploit Public-Facing Application

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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