CVE-2025-30204 — Asymmetric Resource Consumption (Amplification) in Golang-jwt JWT V4
Severity
7.5HIGHNVD
EPSS
0.1%
top 72.04%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 21
Latest updateMar 26
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),…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6
Affected Packages28 packages
▶debiandebian/golang-github-golang-jwt-jwt< golang-github-golang-jwt-jwt 5.0.0+really4.5.2-1 (forky)
▶debiandebian/golang-github-golang-jwt-jwt-v5< golang-github-golang-jwt-jwt 5.0.0+really4.5.2-1 (forky)
🔴Vulnerability Details
4📋Vendor Advisories
4Debian▶
CVE-2025-30204: golang-github-golang-jwt-jwt - golang-jwt is a Go implementation of JSON Web Tokens. Starting in version 3.2.0 ...↗2025
Microsoft
▶
🕵️Threat Intelligence
2💬Community
1Bugzilla▶
CVE-2025-30204 golang-jwt/jwt: jwt-go allows excessive memory allocation during header parsing↗2025-03-21