Summary
jose-swift has JWT Signature Verification Bypass via None Algorithm
Impact
This is an authentication bypass vulnerability. Who is impacted: Any application using jose-swift for JWT verification is vulnerable. An attacker can:
- Forge identity: Create tokens claiming to be any user
- Escalate privileges: Add admin/superuser claims to gain unauthorized access
- Bypass authentication entirely: Access protected resources without valid credentials
- Modify any claim: Change expiration, audience, issuer, or any custom claims
The attack requires no knowledge of the signing key and works against all signature algorithms (HS256, RS256, ES256, etc.) since the attacker simply bypasses signature verification entirely.
The application uses a cryptographic algorithm known to have weaknesses, such as MD5, SHA-1, or DES. Typical impact: compromised confidentiality or integrity of protected data.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is GHSA-88Q6-JCJG-HVMW? GHSA-88Q6-JCJG-HVMW is a high-severity use of a broken or risky cryptographic algorithm vulnerability in github.com/beatt83/jose-swift (swift), affecting versions <= 6.0.1. It is fixed in 6.0.2. The application uses a cryptographic algorithm known to have weaknesses, such as MD5, SHA-1, or DES.
- Which versions of github.com/beatt83/jose-swift are affected by GHSA-88Q6-JCJG-HVMW? github.com/beatt83/jose-swift (swift) versions <= 6.0.1 is affected.
- Is there a fix for GHSA-88Q6-JCJG-HVMW? Yes. GHSA-88Q6-JCJG-HVMW is fixed in 6.0.2. Upgrade to this version or later.
- Is GHSA-88Q6-JCJG-HVMW exploitable, and should I be worried? Whether GHSA-88Q6-JCJG-HVMW is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-88Q6-JCJG-HVMW is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-88Q6-JCJG-HVMW? Upgrade
github.com/beatt83/jose-swiftto 6.0.2 or later.