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CVE-2016-10555
Since "algorithm" isn't enforced in jwt.decode()in jwt-simple 0.3.0 and earlier, a malicious user could choose what algorithm is sent sent…
Medium6.5EPSS 4.8%
- Published
- Updated
- Reserved
- Assigned by
- hackerone
Description
Since "algorithm" isn't enforced in jwt.decode()in jwt-simple 0.3.0 and earlier, a malicious user could choose what algorithm is sent sent to the server. If the server is expecting RSA but is sent HMAC-SHA with RSA's public key, the server will think the public key is actually an HMAC private key. This could be used to forge any data an attacker wants.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.5 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 4.8% · top 8.0% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
HackerOne · jwt-simple node module
- affected <=0.3.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmjwt-simpleGHSA-vgrx-w6rg-8fqf (opens in a new tab)
References (4)
- https://nodesecurity.io/advisories/87 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/hokaccha/node-jwt-simple/pull/14 (opens in a new tab)x_refsource_MISCx_transferred
- https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/ (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/hokaccha/node-jwt-simple/pull/16 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-vgrx-w6rg-8fqf (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2016-10555)Record last updated .