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CVE-2025-30204

jwt-go allows excessive memory allocation during header parsing PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
golang-jwt / jwtaffected >= 3.2.0, < 4.5.2; affected >= 5.0.0-rc.1, < 5.2.2

CWE

CWE-405

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.