CVE-2026-63203

Description

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. From 1.31.0 until 1.42.0, the Account API handlers in packages/core/src/routes/account/third-party-tokens.ts allow a caller holding a same-user access token with only the openid scope to retrieve stored social or enterprise SSO provider access tokens through GET /api/my-account/identities/{target}/access-token or GET /api/my-account/sso-identities/{connectorId}/access-token. The handlers authenticate the user but do not require the identities scope that protects neighboring identity-detail operations, bypassing the intended Account API consent boundary. Exploitation requires federated token-set storage to be enabled and the affected user to have authenticated through a supported connector. A low-trust application can use the disclosed provider token against upstream APIs within that token's granted scopes. This issue is fixed in version 1.42.0.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: HIGH
CVSS score: 7.6 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Effective score: 7.6 / 10 HIGH source: CNA overview
CWE(s): CWE-862
Reserved: 2026-07-15
Published: 2026-09-24 15:18 UTC
Last updated: 2026-09-24 15:47 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/63xxx/CVE-2026-63203.json
Linked Threat: CVE-2026-63203 — Logto: Account API can disclose stored third-party provider tokens without the identities scope

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-24 16:17:08 UTC
NVD last modified: 2026-09-24 16:17:08 UTC
NVD CVSS v3.1: 7.6 / 10 HIGH source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Exploitability subscore: 2.3 / 10
Impact subscore: 4.7 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-86223
Assigner: GitHub_M
Published: Sep 24, 2026, 3:18:32 PM
Updated: Sep 24, 2026, 3:47:41 PM
EUVD base score (CVSS 3.1): 7.6 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
EUVD-reported EPSS: 0.0000
Vendors: logto-io
Products: logto (1.31.0, < 1.42.0)

ENISA description: Logto is the modern, open-source auth infrastructure for SaaS and AI apps. From 1.31.0 until 1.42.0, the Account API handlers in packages/core/src/routes/account/third-party-tokens.ts allow a caller holding a same-user access token with only the openid scope to retrieve stored social or enterprise SSO provider access tokens through GET /api/my-account/identities/{target}/access-token or GET /api/my-account/sso-identities/{connectorId}/access-token. The handlers authenticate the user but do not require the identities scope that protects neighboring identity-detail operations, bypassing the intended Account API consent boundary. Exploitation requires federated token-set storage to be enabled and the affected user to have authenticated through a supported connector. A low-trust application can use the disclosed provider token against upstream APIs within that token's granted scopes. This issue is fixed in version 1.42.0.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
logto-io	logto	`>= 1.31.0, < 1.42.0` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf x_refsource_CONFIRM
https://github.com/logto-io/logto/pull/9116 x_refsource_MISC
https://github.com/logto-io/logto/commit/b560d17a4da4c25da95e3c73af4485d18ab7c224 x_refsource_MISC
https://github.com/logto-io/logto/releases/tag/v1.42.0 x_refsource_MISC

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/logto-io/logto/commit/b560d17a4da4c25da95e3c73af4485d18ab7c224 security-advisories@github.com
https://github.com/logto-io/logto/pull/9116 security-advisories@github.com
https://github.com/logto-io/logto/releases/tag/v1.42.0 security-advisories@github.com
https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf security-advisories@github.com
https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf 134c704f-9b21-4f2e-91b3-4a467353bcc0

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Security Advisory - Action Required - July 2026 Security Update

web:blog.checkpoint.com

Additional information can be found in the respective Secure Knowledge updates as linked below. IoCs IP addresses observed: 151.241.99 [.]207 151.241.99 [.]233 158.62.198 [.]182 192.142.10 [.]99 139.28.37 [.]250 194.213.18 [.]137 Mitigation Apply the following steps to mitigate the Management vulnerabilities: Limit Trusted Clients (GUI clients) to trusted IP addresses/subnets. Protect ...

2026-09-25 10:11 UTC
Oracle Critical Patch Update Advisory - April 2026

web:blogs.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-25 10:11 UTC
July 2026 Critical Patch Update Released | security - Oracle Blogs

web:blogs.oracle.com

For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-09-25 10:11 UTC
Zero-Day Threat Alert: Critical CVEs to Patch Now — May 2026 | Carthage ...

web:carthageelectronics.com

Critical zero-day and exploit roundup for May 2026 . Android, Windows, n8n, Nginx UI vulnerabilities with CVE details and full remediation steps.

2026-09-25 10:11 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-25 10:11 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.

2026-09-25 10:11 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

web:www.openhands.dev

Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

2026-09-25 10:11 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-25 10:11 UTC
Oracle Critical Security Patch Update Advisory - June 2026

web:www.oracle.com

Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

2026-09-25 10:11 UTC
Track Critical Vulnerabilities with Qualys Security Advisories

web:www.qualys.com

Get timely updates on security threats, vulnerabilities, and recommended solutions through Qualys security advisories, helping you secure your infrastructure.

2026-09-25 10:11 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-63203.json.

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