High
Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass
Type: advisorySources: OSV
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, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link to a different IdP subject and the `email_verified` claim was only enforced when present as a boolean `false` so an absent or non-boolean claim was treated as verified. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 restricts the email fallback to first-time and legacy linking and defaults `email_verified` to false when the claim is absent or of an unexpected type. As a workaround, configure the OIDC provider to disallow self-registration or to require email verification before issuing tokens.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-55075
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 15:12 UTC · Revision 1
Source evidence
Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass
core-osv · Original sourcePublished 7 Jul 2026, 21:33 UTC
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, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link to a different IdP subject and the `email_verified` claim was only enforced when present as a boolean `false` so an absent or non-boolean claim was treated as verified. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 restricts the email fallback to first-time and legacy linking and defaults `email_verified` to false when the claim is absent or of an unexpected type. As a workaround, configure the OIDC provider to disallow self-registration or to require email verification before issuing tokens.
osv:CVE-2026-55075
Complete source record
{
"id": "c6c516ff6c3c48945bcece3b904ad84a16cd96e6949a11347332e398846f9b70",
"url": "https://osv.dev/vulnerability/CVE-2026-55075",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass",
"summary": "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, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link to a different IdP subject and the `email_verified` claim was only enforced when present as a boolean `false` so an absent or non-boolean claim was treated as verified. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 restricts the email fallback to first-time and legacy linking and defaults `email_verified` to false when the claim is absent or of an unexpected type. As a workaround, configure the OIDC provider to disallow self-registration or to require email verification before issuing tokens.",
"evidence": "osv:CVE-2026-55075",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-55075",
"aliases": [
"CVE-2026-55075",
"GHSA-9r87-mvcw-x35f",
"GO-2026-5908"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
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"type": "GIT",
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"modified": "2026-10-28T02:30:51.015502349Z",
"provider": "osv",
"references": [
"https://github.com/coder/coder/releases/tag/v2.29.17",
"https://github.com/coder/coder/releases/tag/v2.32.7",
"https://github.com/coder/coder/releases/tag/v2.33.8",
"https://github.com/coder/coder/releases/tag/v2.34.2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55075.json",
"https://github.com/coder/coder/security/advisories/GHSA-9r87-mvcw-x35f",
"https://nvd.nist.gov/vuln/detail/CVE-2026-55075",
"https://github.com/coder/coder/pull/25712",
"https://github.com/coder/coder/pull/25713"
],
"provider_metadata": {
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55075.json"
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"evidence": "/id"
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"security_relevant": true,
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},
"source_id": "core-osv",
"document_id": 519732,
"published_at": "2026-07-07T21:33:38.189+00:00"
}