CVE-2025-30204
jwt-go allows excessive memory allocation during header parsing
- State
- Published
- Severity
- 7.5 High
- Published
- Mar 21, 2025
- Updated
- Apr 10, 2025
- Reserved
- Mar 18, 2025
Description
golang-jwt is a Go implementation of JSON Web Tokens. Starting in version 3.2.0 and prior to versions 5.2.2 and 4.5.2, the function parse.ParseUnverified splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request whose Authorization header consists of Bearer followed by many period characters, a call to that function incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This issue is fixed in 5.2.2 and 4.5.2.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-405 Asymmetric Resource Consumption (Amplification)
Affected Products
| Product | Versions |
|---|---|
jwtgolang-jwt |
|
References
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