# CVE-2025-30204

## Summary

- **CVE ID:** CVE-2025-30204
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-405
- **Published:** Mar 21, 2025
- **Last Modified:** Mar 12, 2026

## 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.

## Affected Products

- golang-jwt — jwt (>= 3.2.0, < 4.5.2)
- golang-jwt — jwt (>= 5.0.0-rc.1, < 5.2.2)

## References

- [CNA](https://github.com/golang-jwt/jwt/security/advisories/GHSA-mh63-6h87-95cp)
- [CNA](https://github.com/golang-jwt/jwt/commit/0951d184286dece21f73c85673fd308786ffe9c3)
- [CNA](https://github.com/golang-jwt/jwt/commit/bf316c48137a1212f8d0af9288cc9ce8e59f1afb)
- [CVE](https://security.netapp.com/advisory/ntap-20250404-0002/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.72%
- **EPSS Percentile:** 51.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._