CVE-2026-123803 (GCVE-0-2026-123803)
Vulnerability from cvelistv5 – Published: 2026-11-09 18:48 – Updated: 2026-11-09 23:01
VLAI
EPSS
VEX
Title
SuperTokens Core: WebAuthn sign-in accepts a passkey across tenant boundaries
Summary
SuperTokens Core is an open source authentication server. From 10.1.0 until 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1, loadOptionsById_Transaction and getUserInfoByCredentialId_Transaction perform application-scoped WebAuthn lookups without constraining them to the requested tenant, and WebAuthN.signIn does not verify tenant membership. In a multi-tenant deployment using WebAuthn with a shared user pool, an ordinary user who possesses their own valid passkey in one tenant can submit its assertion to another tenant's sign-in endpoint in the same application and be authenticated there despite having no membership in the target tenant. This issue is fixed in versions 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 23:00 UTC
Assigner
GitHub_M
CNA
References
18 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| supertokens | supertokens-core |
Affected:
>= 10.1.0, < 11.0.0
Affected: >= 11.0.0, < 11.0.9 Affected: >= 11.1.0, < 11.1.4 Affected: >= 11.2.0, < 11.2.4 Affected: >= 11.3.0, < 11.3.8 Affected: >= 11.4.0, < 11.4.8 Affected: >= 12.0.0, < 12.0.11 Affected: >= 12.1.0, < 12.1.2 Affected: >= 12.2.0, < 12.2.1 Affected: >= 12.3.0, < 12.3.1 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-123803",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-11-09T23:00:35.473876Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-11-09T23:01:11.131Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "supertokens-core",
"vendor": "supertokens",
"versions": [
{
"status": "affected",
"version": "\u003e= 10.1.0, \u003c 11.0.0"
},
{
"status": "affected",
"version": "\u003e= 11.0.0, \u003c 11.0.9"
},
{
"status": "affected",
"version": "\u003e= 11.1.0, \u003c 11.1.4"
},
{
"status": "affected",
"version": "\u003e= 11.2.0, \u003c 11.2.4"
},
{
"status": "affected",
"version": "\u003e= 11.3.0, \u003c 11.3.8"
},
{
"status": "affected",
"version": "\u003e= 11.4.0, \u003c 11.4.8"
},
{
"status": "affected",
"version": "\u003e= 12.0.0, \u003c 12.0.11"
},
{
"status": "affected",
"version": "\u003e= 12.1.0, \u003c 12.1.2"
},
{
"status": "affected",
"version": "\u003e= 12.2.0, \u003c 12.2.1"
},
{
"status": "affected",
"version": "\u003e= 12.3.0, \u003c 12.3.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "SuperTokens Core is an open source authentication server. From 10.1.0 until 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1, loadOptionsById_Transaction and getUserInfoByCredentialId_Transaction perform application-scoped WebAuthn lookups without constraining them to the requested tenant, and WebAuthN.signIn does not verify tenant membership. In a multi-tenant deployment using WebAuthn with a shared user pool, an ordinary user who possesses their own valid passkey in one tenant can submit its assertion to another tenant\u0027s sign-in endpoint in the same application and be authenticated there despite having no membership in the target tenant. This issue is fixed in versions 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863: Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1220",
"description": "CWE-1220: Insufficient Granularity of Access Control",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-09T18:48:51.355Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/supertokens/supertokens-core/security/advisories/GHSA-6v34-w48w-44rc",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/supertokens/supertokens-core/security/advisories/GHSA-6v34-w48w-44rc"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/01ca34a06baa0d22db008f38c8eabd1f6695d9a6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/01ca34a06baa0d22db008f38c8eabd1f6695d9a6"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/030643edea5d69e0009ceeecbc5dd70be5c66186",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/030643edea5d69e0009ceeecbc5dd70be5c66186"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/1e3e4d9b25237a9c8fd77cbe0d4d0ecb360d8cd6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/1e3e4d9b25237a9c8fd77cbe0d4d0ecb360d8cd6"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/84492e38f9eb6db0cc338674ce5e94d1603bef08",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/84492e38f9eb6db0cc338674ce5e94d1603bef08"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/982d420a5ac29d5e362eaf39169a7a9f5339abeb",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/982d420a5ac29d5e362eaf39169a7a9f5339abeb"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/a3d033022effb00ccf0c4ec6ca77c36eb1a24617",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/a3d033022effb00ccf0c4ec6ca77c36eb1a24617"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/ad768c1925e245930e5fbf9441452d85564de91d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/ad768c1925e245930e5fbf9441452d85564de91d"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/b933b6c9b4495e47a8b3efeb5a70e9d014777320",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/b933b6c9b4495e47a8b3efeb5a70e9d014777320"
},
{
"name": "https://github.com/supertokens/supertokens-core/commit/e19d173f47658d036685d3020e18819c5f3690b7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/commit/e19d173f47658d036685d3020e18819c5f3690b7"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v11.0.9",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v11.0.9"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v11.1.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v11.1.4"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v11.2.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v11.2.4"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v11.3.8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v11.3.8"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v12.0.11",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v12.0.11"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v12.1.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v12.1.2"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v12.2.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v12.2.1"
},
{
"name": "https://github.com/supertokens/supertokens-core/releases/tag/v12.3.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/supertokens/supertokens-core/releases/tag/v12.3.1"
}
],
"source": {
"advisory": "GHSA-6v34-w48w-44rc",
"discovery": "UNKNOWN"
},
"title": "SuperTokens Core: WebAuthn sign-in accepts a passkey across tenant boundaries"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-123803",
"datePublished": "2026-11-09T18:48:51.355Z",
"dateReserved": "2026-11-06T15:27:56.226Z",
"dateUpdated": "2026-11-09T23:01:11.131Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.