GHSA-mh63-6h87-95cp

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

jwt-go allows excessive memory allocation during header parsing

Details

Summary

Function <code>parse.ParseUnverified</code> currently 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. Relevant weakness: CWE-405: Asymmetric Resource Consumption (Amplification)

Details

See <code>parse.ParseUnverified</code>

Impact

Excessive memory allocation

Database specific

{
    "nvd_published_at": "2025-03-21T22:15:26Z",
    "severity": "HIGH",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-405"
    ],
    "github_reviewed_at": "2025-03-21T22:04:00Z"
}

References

Affected packages

Go / github.com/golang-jwt/jwt/v5

Package

Name: github.com/golang-jwt/jwt/v5; View open source insights on deps.dev
Purl: pkg:golang/github.com/golang-jwt/jwt/v5

Affected ranges

Type: SEMVER
Events: Introduced

5.0.0-rc.1

Fixed

5.2.2

Go / github.com/golang-jwt/jwt/v4

Package

Name: github.com/golang-jwt/jwt/v4; View open source insights on deps.dev
Purl: pkg:golang/github.com/golang-jwt/jwt/v4

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.5.2