CVSS 3.0
9.8 criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2015-9235
In jsonwebtoken node module before 4.2.2 it is possible for an attacker to bypass verification when a token digitally signed with an asymmetric key (RS/ES family) of algorithms but instead the attacker send a token digitally signed with a symmetric algorithm (HS* family).
Severity
- EPSS
- 8.5% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-327, CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Affected
- auth0:jsonwebtoken
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-c7hr-j4mj-j2w6 | npm | jsonwebtoken | <4.2.2 | 4.2.2 |
References
- https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/
- https://github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687
- https://nodesecurity.io/advisories/17
- https://www.timmclean.net/2015/02/25/jwt-alg-none.html
- https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/