Account takeover via client-controlled OAuth identity binding
Published Apr 20, 2026 · Updated Apr 20, 2026
Improper authorization in liangliangyy DjangoBlog 2.1.0 allows remote authenticated users to take over accounts through OAuth identity rebinding. RequireEmailView.form_valid accepts a client-controlled oauthid, retrieves that OAuthUser without ownership validation, and overwrites its email address. Exploitation requires completing an OAuth login and confirming an attacker-controlled email, after which the victim's social identity is bound to the attacker's account.
Summary
What happened
Improper authorization in liangliangyy DjangoBlog 2.1.0 allows remote authenticated users to take over accounts through OAuth identity rebinding. RequireEmailView.form_valid accepts a client-controlled oauthid, retrieves that OAuthUser without ownership validation, and overwrites its email address. Exploitation requires completing an OAuth login and confirming an attacker-controlled email, after which the victim's social identity is bound to the attacker's account.
The record
- CVE
- CVE-2026-6609
- Published
- Apr 20, 2026
- Updated
- Apr 20, 2026
- Vendor
- liangliangyy
- Product
- DjangoBlog
- Classifications
- CWE-266, CWE-285, T1078
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 20, 2026CVE publishedPublication date reported by the CVE source.
- Apr 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.1.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- OAuth Email Binding IDOR proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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