V2: Coder: Devcontainer recreate endpoint missing write authorization allows read-only roles to destroy containers (CVE-2026-55433)
### Summary The devcontainer recreate endpoint relied on route middleware that checked only `ActionRead` on the workspace and, unlike the sibling delete endpoint, performed no `ActionUpdate` check before triggering the destructive rebuild. > **Note:** Exploitation requires an existing low-privilege role with access to the target workspace. ### Impact Any authenticated principal with read-only workspace access, such as a Template Admin or Org Template Admin, could recreate a devcontainer, destroying uncommitted in-container state and, if called repeatedly, denying service. This is an authorization bypass leading to data loss and denial of service. ### Patches The fix adds an explicit `ActionUpdate` authorization check before the agent is dialed like the delete endpoint. The fix was backported to all supported release lines: | Release line | Patched version | |---|---| | 2.34 | [v2.34.2](https://github.com/coder/coder/releases/tag/v2.34.2) | | 2.33 | [v2.33.8](https://github.com/coder/coder/releases/tag/v2.33.8) | | 2.32 | [v2.32.7](https://github.com/coder/coder/releases/tag/v2.32.7) | | 2.29 (ESR) | [v2.29.17](https://github.com/coder/coder/releases/tag/v2.29.17) | ### Workarounds None. ### Resources - Fix: #25812 ### Credits Coder would like to thank Anthropic's Security Team (ANT-2026-22454) for independently disclosing this issue!
AI Analysis
Technical Summary
The devcontainer recreate endpoint in Coder's software relied on middleware that only checked read permissions (ActionRead) on the workspace, unlike the delete endpoint which also checked update permissions (ActionUpdate). This allowed any authenticated user with read-only access to recreate (and thus destroy) devcontainers, causing loss of uncommitted data and potential denial of service through repeated calls. The vulnerability requires an existing low-privilege role with access to the workspace. The fix introduces an explicit ActionUpdate authorization check before the destructive operation is performed. The fix has been backported to all supported release lines, including versions 2.34.2, 2.33.8, 2.32.7, and 2.29.17.
Potential Impact
Authenticated users with read-only workspace access can bypass intended authorization controls to destroy devcontainers, resulting in loss of uncommitted data and potential denial of service. This represents an authorization bypass vulnerability leading to integrity and availability impacts but does not affect confidentiality.
Mitigation Recommendations
A fix is available and has been backported to all supported release lines. Users should upgrade to versions 2.34.2, 2.33.8, 2.32.7, or 2.29.17 or later to remediate this vulnerability. No workarounds exist. Applying the official update is the recommended mitigation.
V2: Coder: Devcontainer recreate endpoint missing write authorization allows read-only roles to destroy containers (CVE-2026-55433)
Description
### Summary The devcontainer recreate endpoint relied on route middleware that checked only `ActionRead` on the workspace and, unlike the sibling delete endpoint, performed no `ActionUpdate` check before triggering the destructive rebuild. > **Note:** Exploitation requires an existing low-privilege role with access to the target workspace. ### Impact Any authenticated principal with read-only workspace access, such as a Template Admin or Org Template Admin, could recreate a devcontainer, destroying uncommitted in-container state and, if called repeatedly, denying service. This is an authorization bypass leading to data loss and denial of service. ### Patches The fix adds an explicit `ActionUpdate` authorization check before the agent is dialed like the delete endpoint. The fix was backported to all supported release lines: | Release line | Patched version | |---|---| | 2.34 | [v2.34.2](https://github.com/coder/coder/releases/tag/v2.34.2) | | 2.33 | [v2.33.8](https://github.com/coder/coder/releases/tag/v2.33.8) | | 2.32 | [v2.32.7](https://github.com/coder/coder/releases/tag/v2.32.7) | | 2.29 (ESR) | [v2.29.17](https://github.com/coder/coder/releases/tag/v2.29.17) | ### Workarounds None. ### Resources - Fix: #25812 ### Credits Coder would like to thank Anthropic's Security Team (ANT-2026-22454) for independently disclosing this issue!
CVSS v3.1
Score 5.4medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The devcontainer recreate endpoint in Coder's software relied on middleware that only checked read permissions (ActionRead) on the workspace, unlike the delete endpoint which also checked update permissions (ActionUpdate). This allowed any authenticated user with read-only access to recreate (and thus destroy) devcontainers, causing loss of uncommitted data and potential denial of service through repeated calls. The vulnerability requires an existing low-privilege role with access to the workspace. The fix introduces an explicit ActionUpdate authorization check before the destructive operation is performed. The fix has been backported to all supported release lines, including versions 2.34.2, 2.33.8, 2.32.7, and 2.29.17.
Potential Impact
Authenticated users with read-only workspace access can bypass intended authorization controls to destroy devcontainers, resulting in loss of uncommitted data and potential denial of service. This represents an authorization bypass vulnerability leading to integrity and availability impacts but does not affect confidentiality.
Mitigation Recommendations
A fix is available and has been backported to all supported release lines. Users should upgrade to versions 2.34.2, 2.33.8, 2.32.7, or 2.29.17 or later to remediate this vulnerability. No workarounds exist. Applying the official update is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jqj2-x4c5-jfxm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-55433"]
- Ecosystems
- ["Go"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a4c340327e9c797195f5f2c
Added to database: 07/06/2026, 23:02:27 UTC
Last enriched: 07/06/2026, 23:12:05 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 36
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