CVE-2025-30204

golang-jwt is a Go implementation of JSON Web Tokens. Prior to 
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.
Amplification
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub_MCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADPADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
Debian logo
Debian Releases
Debian Product
Codename
golang-github-golang-jwt-jwt
bookworm
no-dsa
sid
5.0.0+really4.5.2-1
fixed
trixie
5.0.0+really4.5.2-1
fixed
golang-github-golang-jwt-jwt-v5
sid
5.2.2-1
fixed
trixie
5.2.2-1
fixed
bookworm
no-dsa