What’s Vulnerable › Vulnerabilities
CVE-2020-7692: Improper Authorization
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.5% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2020-07-09 · updated 2026-06-17
- Weakness: CWE-863
Description
PKCE support is not implemented in accordance with the RFC for OAuth 2.0 for Native Apps. Without the use of PKCE, the authorization code returned by an authorization server is not enough to guarantee that the client that issued the initial authorization request is the one that will be authorized. An attacker is able to obtain the authorization code using a malicious app on the client-side and use it to gain authorization to the protected resource. This affects the package com.google.oauth-client:google-oauth-client before 1.31.0.
Affected products
- Google LLC Google-oauth-java-client: before 1.31.0 — fixed in 1.31.0
How to fix
Upgrade to a fixed version: Google LLC Google-oauth-java-client 1.31.0. Check the vendor advisory for mitigations.
References
- https://github.com/googleapis/google-oauth-java-client/commit/13433cd7dd06267fc261f0b1d4764f8e3432c824
- https://github.com/googleapis/google-oauth-java-client/issues/469
- https://lists.apache.org/thread.html/r3db6ac73e0558d64f0b664f2fa4ef0a865e57c5de20f8321d3b48678%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/reae8909b264d1103f321b9ce1623c10c1ddc77dba9790247f2c0c90f%40%3Ccommits.druid.apache.org%3E
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEOAUTHCLIENT-575276
- https://tools.ietf.org/html/rfc7636%23section-1
- https://tools.ietf.org/html/rfc8252%23section-8.1
- https://github.com/googleapis/google-oauth-java-client/commit/13433cd7dd06267fc261f0b1d4764f8e3432c824
- https://github.com/googleapis/google-oauth-java-client/issues/469
- https://lists.apache.org/thread.html/r3db6ac73e0558d64f0b664f2fa4ef0a865e57c5de20f8321d3b48678%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/reae8909b264d1103f321b9ce1623c10c1ddc77dba9790247f2c0c90f%40%3Ccommits.druid.apache.org%3E
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEOAUTHCLIENT-575276
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