🛡️ CVE-2026-55954 — ueberauth-apple

⚪ Unknown ✅ No Known Exploit CWE-290 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Missing ID token claim validation in ueberauth_apple allows account takeover

Summary

Authentication Bypass by Spoofing vulnerability in ueberauth ueberauth\_apple allows account takeover via unvalidated ID token claims.

The Ueberauth.Strategy.Apple.Token.payload/2 function verifies the JWT signature of the callback id\_token against Apple's JWKS but does not validate any registered claims. The iss, aud, exp, and iat claims are read from the token and passed on to Ueberauth.Strategy.Apple.handle\_callback!/1, which derives the logged-in user's uid and email directly from the unvalidated sub claim.

An attacker who obtains any Apple-signed ID token bearing the victim's sub (via a captured expired token, or via an ID token issued to a sibling client in the same Apple developer team) can replay it against the vulnerable callback and be authenticated as the victim. The absent exp check makes stolen tokens usable indefinitely, and the absent aud check enables cross-application account takeover across clients that share an Apple developer team.

This issue affects ueberauth\_apple: from 0.1.0 before 0.6.2.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2026-55954 is classified as CWE-290: Authentication Bypass by Spoofing. Identity is inferred from something an attacker can forge, such as a header or address.

Affected software

CVE-2026-55954 is recorded against 2 packages.

  • ueberauth-apple
  • unknown

Timeline and source

Published on 14 July 2026 and last revised on 30 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Advisory)
cna.erlef.org (Web)
github.com (Fix)
hex.pm (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CWE CWE-290
Public Exploit ✅ No
Source NVD
Published 2026-07-14
Updated 2026-08-12
Modified 2026-07-30

Affected Packages

Software From version Fixed in
ueberauth-apple — —
unknown — —

Free Vulnerability Check

Is your site affected by CVE-2026-55954?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against CVE-2026-55954 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.