🛡️ CVE-2026-55433 — coder

🟡 CVSS 5.4 — Medium ✅ No Known Exploit CWE-862 NVD
5.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Coder: Devcontainer recreate endpoint missing write authorization allows read-only roles to destroy containers

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!

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability low.

Weakness class

CVE-2026-55433 is classified as CWE-862: Missing Authorization. No authorisation check is performed before carrying out a restricted action.

Affected software

CVE-2026-55433 is recorded against 3 packages.

  • coder (from 2.34.0 up to 2.34.2)
  • github.com/coder/coder
  • github.com/coder/coder/v2

Timeline and source

Published on 8 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
github.com
github.com
github.com
github.com

Details

Severity MEDIUM
CVSS Score 5.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CWE CWE-862
Public Exploit ✅ No
Source NVD
Published 2026-07-08
Updated 2026-08-12
Modified 2026-07-08

Affected Packages

Software From version Fixed in
coder 2.34.0 2.34.2
github.com/coder/coder — —
github.com/coder/coder/v2 — —

Similar Threats

Vulnerability Monitoring

Track new vulnerabilities in coder

CVE-2026-55433 is rated CVSS 5.4 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.

Set Up Free Alerts →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2026