Unauthenticated account takeover via unvalidated ID token claims
Published Jul 14, 2026 · Updated Jul 14, 2026
Authentication bypass in ueberauth_apple 0.1.0 through 0.6.1 allows remote attackers to take over accounts via replayed Apple ID tokens. Token.payload/2 verifies the JWT signature but returns claims without validating iss, aud, exp, iat, or nonce, and handle_callback!/1 derives identity from the unchecked sub value. Exploitation requires an Apple-signed token bearing the victim's sub and a usable authorization code; an expired token or one from a sibling client in the same developer team suffices.
Summary
What happened
Authentication bypass in ueberauth_apple 0.1.0 through 0.6.1 allows remote attackers to take over accounts via replayed Apple ID tokens. Token.payload/2 verifies the JWT signature but returns claims without validating iss, aud, exp, iat, or nonce, and handle_callback!/1 derives identity from the unchecked sub value. Exploitation requires an Apple-signed token bearing the victim's sub and a usable authorization code; an expired token or one from a sibling client in the same developer team suffices.
The record
- CVE
- CVE-2026-55954
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- ueberauth
- Product
- ueberauth_apple
- Classifications
- CWE-290, CAPEC-60, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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=0.1.0 <0.6.2
- Affected versionversion=3908a187d045c75994b62ce340c3aa26bb8976b8 <01e2d9c9b3134e1b78633ad82d136d5ff4a61f28
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- Upstream Apple ID token replay proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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