CVE-2025-30204

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.

Reserved 2025-03-18 | Published 2025-03-21 | Updated 2025-04-10 | Assigner GitHub_M

Problem types

CWE-405: Asymmetric Resource Consumption (Amplification)

Product status

>= 3.2.0, < 4.5.2
affected

>= 5.0.0-rc.1, < 5.2.2
affected

References

github.com/...wt/jwt/security/advisories/GHSA-mh63-6h87-95cp

github.com/...ommit/0951d184286dece21f73c85673fd308786ffe9c3

github.com/...ommit/bf316c48137a1212f8d0af9288cc9ce8e59f1afb

cve.org (CVE-2025-30204)

nvd.nist.gov (CVE-2025-30204)

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