Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.24.0 and prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `NewDataBuilder` in `provisionersdk/proto/dataupload.go` allocated a byte slice using the client-supplied `FileSize` from a `DataUpload` message without an upper-bound check. Although the DRPC wire limit is 4 MiB, the `FileSize` value itself was unconstrained. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 validates `FileSize` against an upper bound (`MaxFileSize = 100 MiB`) before allocation. As a workaround, restrict access to the provisioner daemon serve endpoint to trusted provisioner daemon service accounts.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00641.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
coder coder affected
Version Status Constraints
>= 2.34.0, < 2.34.2 affected —
>= 2.33.0, < 2.33.8 affected —
>= 2.30.0, < 2.32.7 affected —
>= 2.24.0, < 2.29.17 affected —

No data.

No data.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-f962-qm93-mj4c Coder's unbounded memory allocation in provisioner file upload allows authenticated denial of service
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/coder/coder/pull/25710 cve-icon
https://github.com/coder/coder/releases/tag/v2.29.17 cve-icon
https://github.com/coder/coder/releases/tag/v2.32.7 cve-icon
https://github.com/coder/coder/releases/tag/v2.33.8 cve-icon
https://github.com/coder/coder/releases/tag/v2.34.2 cve-icon
https://github.com/coder/coder/security/advisories/GHSA-f962-qm93-mj4c cve-icon
History

Wed, 08 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 08 Jul 2026 03:30:00 +0000

Type Values Removed Values Added
First Time appeared Coder
Coder coder
Vendors & Products Coder
Coder coder

Wed, 08 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Description Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.24.0 and prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `NewDataBuilder` in `provisionersdk/proto/dataupload.go` allocated a byte slice using the client-supplied `FileSize` from a `DataUpload` message without an upper-bound check. Although the DRPC wire limit is 4 MiB, the `FileSize` value itself was unconstrained. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 validates `FileSize` against an upper bound (`MaxFileSize = 100 MiB`) before allocation. As a workaround, restrict access to the provisioner daemon serve endpoint to trusted provisioner daemon service accounts.
Title Coder's unbounded memory allocation in provisioner file upload allows authenticated denial of service
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-08T12:53:41.432Z

Reserved: 2026-06-16T14:33:35.711Z

Link: CVE-2026-55079

cve-icon Vulnrichment

Updated: 2026-07-08T12:53:32.877Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-08T15:45:03Z

Weaknesses