CVSS 3.1
5.4 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NCVE-2026-55437
Medium (5.4) in coder coder. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/coder/coder/v2 2.29.17, 2.32.7, 2.33.8.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-31)
- CWE
- CWE-79
- Published
- Modified
- Record from
- the NVD, synced
Affected
- coder:coder
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-7qw2-f75v-62f7 | 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 |
| GO-2026-5919 | Go | github.com/coder/coder | all versions | no fix published |
| GO-2026-5919 | 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 |