CVE-2026-55079: 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…

PriorityP338medium6.5CVSS 3.1

AVNACLPRLUINSUCNINAH

EPSS

0.61%

47.9th percentile

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.

Affected

12 ranges

Vendor	Product	Version range	Fixed in
coder	coder	—	—
coder	coder	—	—
coder	coder	—	—
coder	coder	—	—
coder	coder	>= 2.24.0 < 2.29.17	2.29.17
coder	coder	>= 2.30.0 < 2.32.7	2.32.7
coder	coder	>= 2.33.0 < 2.33.8	2.33.8
coder	coder	>= 2.34.0 < 2.34.2	2.34.2
github.com	coder_coder_v2	>= 2.24.0 < 2.29.17	2.29.17
github.com	coder_coder_v2	>= 2.30.0 < 2.32.7	2.32.7
github.com	coder_coder_v2	>= 2.33.0 < 2.33.8	2.33.8
github.com	coder_coder_v2	>= 2.34.0 < 2.34.2	2.34.2

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