Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/golang-jwt/jwt/commit/0951d184286dece21f73c85673fd308786ffe9c
- https://github.com/golang-jwt/jwt/commit/bf316c48137a1212f8d0af9288cc9ce8e59f1af
- https://github.com/golang-jwt/jwt/security/advisories/GHSA-mh63-6h87-95cp
- https://security.netapp.com/advisory/ntap-20250404-0002/
FAQ
What is CVE-2025-30204?
CVE-2025-30204 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 argum...
How severe is CVE-2025-30204?
CVE-2025-30204 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-30204?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.