What’s Vulnerable › Vulnerabilities

CVE-2026-108157: Pingvin Share X 0.19.0 before 1.22.0 Account Takeover via OAuth Email Linking

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-09
• Weakness: CWE-287

Description

Pingvin Share X from 0.19.0 before 1.22.0 contains an improper authentication vulnerability that allows remote unauthenticated attackers to take over accounts by abusing automatic OAuth email linking in OAuthService.signUp(). Attackers can register a victim's unverified email on an enabled OAuth/OIDC provider, exploiting the missing email_verified check in GenericOidcProvider, to sign in as the victim including administrators while bypassing TOTP.

Affected products

• smp46 pingvin-share-x: from 0.19.0 before 1.22.0 — fixed in 1.22.0

How to fix

Upgrade to a fixed version: smp46 pingvin-share-x 1.22.0. Check the vendor advisory for mitigations.

References

• https://github.com/smp46/pingvin-share-x
• https://github.com/smp46/pingvin-share-x/blob/de7ffecf9bfc4976993149a5c4c98efe35161424/backend/src/oauth/oauth.service.ts#L158-L175
• https://github.com/smp46/pingvin-share-x/commit/07aa8c0a96030c439e9018ce94a2778bd37304e6
• https://github.com/smp46/pingvin-share-x/releases/tag/v1.22.0
• https://github.com/smp46/pingvin-share-x/security/advisories/GHSA-wrcg-4874-45p7
• https://www.vulncheck.com/advisories/pingvin-share-x-0.19.0-before-1.22.0-account-takeover-via-oauth-email-linking

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