CVE-2026-55076Coder's OIDC email_verified type coercion bypass enables account takeover via unverified email linking
- 7.4HighCVSS base score
- 0.61%Exploitation in 30 daysEPSS · top 50% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, Coder's OIDC callback checked `email_verified` with a direct Go `bool` type assertion. When an IdP returned the claim as a non-boolean (for example the string `"false"`) or omitted it, the assertion failed open and the email was treated as verified. Combined with an unconditional email-based account fallback, this enabled account takeover. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 coerces `email_verified` across bool, string and numeric types (fail-closed) and blocks the email fallback when the matched user already has a different linked IdP subject. As a workaround, ensure the IdP returns `email_verified` as a native JSON boolean. The email-fallback linking issue has no configuration workaround; upgrading is required.
Timeline
ID reserved
By GitHub_M
- 21 days later
· 21 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.61% · top 50% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/coder/coder/v2GHSA-75vm-6w67-gwvp (opens in a new tab)
References
References7
- https://github.com/coder/coder/security/advisories/GHSA-75vm-6w67-gwvp (opens in a new tab)x_refsource_CONFIRM
- https://github.com/coder/coder/pull/25712 (opens in a new tab)x_refsource_MISC
- https://github.com/coder/coder/pull/25713 (opens in a new tab)x_refsource_MISC
- https://github.com/coder/coder/releases/tag/v2.29.17 (opens in a new tab)x_refsource_MISC
- https://github.com/coder/coder/releases/tag/v2.32.7 (opens in a new tab)x_refsource_MISC
- https://github.com/coder/coder/releases/tag/v2.33.8 (opens in a new tab)x_refsource_MISC
- https://github.com/coder/coder/releases/tag/v2.34.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-42129 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-75vm-6w67-gwvp (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-55076)Record last updated .