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OpenAdvisories
Medium · 6.5 CVE-2026-55434 EUVD-2026-42086GHSA-f5vp-w269-392gGO-2026-5921

Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints

Published Jul 7, 2026 · Updated Jul 8, 2026 · Assigned by GitHub_M

Description

Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.33.0 and prior to versions 2.33.8 and 2.34.2, AI Bridge provider handlers read request bodies with `io.ReadAll` without a maximum size so an authenticated user with AI Bridge access could send an arbitrarily large body and exhaust memory. Exploitation requires authenticated access to the AI Bridge endpoints and the impact is limited to availability (denial of service). Versions 2.33.8 and 2.34.2 patch the issue. No known workarounds are available.

Affected products

VendorProductAffectedFixed
coder coder >= 2.34.0, < 2.34.2, >= 2.33.0, < 2.33.8 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/coder/coder all versions — GO-2026-5921
Go github.com/coder/coder/v2 >= 2.34.0, < 2.34.2 2.34.2 GHSA-f5vp-w269-392g
Go github.com/coder/coder/v2 >= 2.33.0, < 2.33.8 2.33.8 GHSA-f5vp-w269-392g
Go github.com/coder/coder/v2 >= 2.33.0, < 2.33.8 · >= 2.34.0, < 2.34.2 2.33.8, 2.34.2 GO-2026-5921

Advisories 1

References