GHSA-mh63-6h87-95cp · Severity: high · Ecosystem: go — jwt-go allows excessive memory allocation during header parsing
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.
Conclusion & alert: CVE-2025-30204 is rated Low Risk (36.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.06%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-11-24 | 0.04% | 0.06% | +0.02% |
| 2 | 2025-11-21 | 0.24% | 0.04% | -0.19% |
| 3 | 2025-11-18 | — | 0.24% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-mh63-6h87-95cp · Severity: high · Ecosystem: go — jwt-go allows excessive memory allocation during header parsing
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2025-30204: 1 source package rows (rclone); 2 state rows across 2 repos (3.22-community, edge-community); fixed 2, open 0. | https://security.alpinelinux.org/vuln/CVE-2025-30204 |
debian
|
not yet assigned | CVE-2025-30204 not yet assigned priority: Debian including 2 source packages (golang-github-golang-jwt-jwt, golang-github-golang-jwt-jwt-v5), 7 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 6, open 1. | https://security-tracker.debian.org/tracker/CVE-2025-30204 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-30204 |
suse
|
high | CVE-2025-30204 severity important: SUSE including 193 source package names (13.2-9.11:libexpat1-2.7.1-slfo.1.1_3.1, 13.2-9.11:libsolv-tools-base-0.7.34-1.1, …), 664 product×package rows across 83 product lines (Container containers/milvus, Container suse/sl-micro/6.0/baremetal-os-container, … (83 product lines)): Known Not Affected 369, Fixed 289, First Fixed 6. | https://www.suse.com/security/cve/CVE-2025-30204/ |
ubuntu
|
medium | CVE-2025-30204 medium priority: Ubuntu including 2 source packages (golang-github-golang-jwt-jwt, golang-github-golang-jwt-jwt-v5), 14 status rows across 7 suites (focal, jammy, noble, oracular, plucky, questing, upstream): not-affected 4, DNE 3, needs-triage 3, ignored 2, released 2. | https://ubuntu.com/security/CVE-2025-30204 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||