Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Coder (github.com/coder/coder/v2) versions before 2.29.17, from 2.30.0 before 2.32.7, from 2.33.0 before 2.33.8, and from 2.34.0 before 2.34.2 are affected. The ApplicationName and LogoURL appearance settings were not escaped when rendered, so a user with the Owner role can store HTML that is then shown to other users in the dashboard and in SMTP notification emails. Upgrade to 2.29.17, 2.32.7, 2.33.8, or 2.34.2, matching your release line; until then, restrict the Owner role to trusted administrators.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.8 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0017, the 6th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 17 Oct 2026, 19:16 UTC Confirmed by NVD
- 31 Oct 2026, 14:12 UTC First seen by agentprime
- 31 Oct 2026, 14:12 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-h58c-xccx-75m3
- OSV: GHSA-h58c-xccx-75m3
- github.com/coder/coder/security/advisories/GHSA-h58c-xccx-75m3
- github.com/coder/coder/pull/25804
- github.com/coder/coder/commit/ec19bc41d80568c0eb9f74b526e8cc8ffbe3be9a
- github.com/coder/coder
- github.com/coder/coder/releases/tag/v2.29.17
- github.com/coder/coder/releases/tag/v2.32.7
- github.com/coder/coder/releases/tag/v2.33.8
- github.com/coder/coder/releases/tag/v2.34.2