Auth bypass in Jwt-Go Project
CVE-2020-26160
jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.
Vulnerability class: Broken Authentication
EPSS: 0.022 (80.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Jwt-go_project Jwt-go
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-26160?
- CVE-2020-26160 is a high-severity vulnerability in Jwt-Go Project, classified under Improper Authentication. CVSS score: 7.5/10. Published 2020-09-30.
- How severe is CVE-2020-26160?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-26160 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.