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OpenAdvisories
Medium · 5.4 CVE-2026-55437 EUVD-2026-42150GHSA-7qw2-f75v-62f7GO-2026-5919

Coder vulnerable to stored HTML injection via workspace agent logs in AgentLogLine component

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

Description

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.17, 2.32.7, 2.33.8, and 2.34.2, the `AgentLogLine` dashboard component instantiated `ansi-to-html` without `escapeXML: true` and inserted the result via `dangerouslySetInnerHTML` so HTML embedded in workspace agent log lines was rendered as live markup. Server-side sanitization did not neutralize HTML metacharacters. Exploitation requires a victim to view attacker-controlled agent logs in the dashboard. The fix in versions 2.29.17, 2.32.7, 2.33.8, and 2.34.2 enables `escapeXML: true` so HTML metacharacters are escaped before DOM insertion. No known workarounds are available.

Affected products

VendorProductAffectedFixed
coder coder >= 2.34.0, < 2.34.2, >= 2.33.0, < 2.33.8, >= 2.30.0, < 2.32.7, < 2.29.17 —

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-2026-5919
Go github.com/coder/coder/v2 >= 2.34.0, < 2.34.2 2.34.2 GHSA-7qw2-f75v-62f7
Go github.com/coder/coder/v2 >= 2.33.0, < 2.33.8 2.33.8 GHSA-7qw2-f75v-62f7
Go github.com/coder/coder/v2 >= 2.30.0, < 2.32.7 2.32.7 GHSA-7qw2-f75v-62f7
Go github.com/coder/coder/v2 < 2.29.17 2.29.17 GHSA-7qw2-f75v-62f7
Go github.com/coder/coder/v2 < 2.29.17 · >= 2.30.0, < 2.32.7 · >= 2.33.0, < 2.33.8 · >= 2.34.0, < 2.34.2 2.29.17, 2.32.7, 2.33.8, 2.34.2 GO-2026-5919

Advisories 1

References