What is GHSA-9mj6-hxhv-w67j?

GHSA-9mj6-hxhv-w67j is a security advisory published by GitHub Security Advisories with High severity. jose2go is vulnerable to a JWT bomb attack through its decode function

Which CVE IDs does GHSA-9mj6-hxhv-w67j cover?

GHSA-9mj6-hxhv-w67j covers the following CVE IDs: CVE-2025-63811. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-9mj6-hxhv-w67j?

GHSA-9mj6-hxhv-w67j has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

Which products are affected by GHSA-9mj6-hxhv-w67j?

GHSA-9mj6-hxhv-w67j affects 1 product, including: go/github.com/dvsekhvalnov/jose2go:\u003c 1.7.0.

GHSA-9mj6-hxhv-w67jHighCVSS 7.5

jose2go is vulnerable to a JWT bomb attack through its decode function

Vendor

GitHub Security Advisories

Published

November 12, 2025

Last Modified

November 14, 2025

🔗 CVE IDs covered (1)

CVE-2025-63811 →

📋 Description

An issue was discovered in dvsekhvalnov jose2go 1.5.0 thru 1.7.0 allowing an attacker to cause a Denial-of-Service (DoS) via crafted JSON Web Encryption (JWE) token with an exceptionally high compression ratio.

🎯 Affected products1

go/github.com/dvsekhvalnov/jose2go:< 1.7.0

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2025-63811
https://github.com/dvsekhvalnov/jose2go/issues/33
https://github.com/dvsekhvalnov/jose2go/commit/0a0673dd7f2820a446de5b04b9094b2291d77d5d
https://github.com/advisories/GHSA-9mj6-hxhv-w67j